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    Universal Security Instruments USI-3204-2P-3CC Photoelectric Smoke Alarm, 2-Piece Value Pack

    Universal Security Instruments USI-3204-2P-3CC Photoelectric Smoke Alarm, 2-Piece Value Pack

    Don't let emergencies sneak up on you with help from these Universal Security Instruments USI-3204-2P-3CC Photoelectric Smoke Alarms. They are a necessary component for every home or business. Use these home smoke alarms to keep your family, friends... more

    $40.97 $36.13

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    Universal Security Instruments USI-3204-6P Photoelectric Smoke Alarm

    Universal Security Instruments USI-3204-6P Photoelectric Smoke Alarm

    Be ready in the event of an emergency with this Universal Security Instruments USI-3204-6P Photoelectric Smoke Alarm. It is ideal to have in every home, office or place of business. This fire smoke alarm is made of plastic and is easy to install. It... more

    $23.97 $8.62

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    Universal Security Instruments MICN109 3-in-1 IoPhic Smoke, Carbon Monoxide and Natural Gas Smart Alarm

    Universal Security Instruments MICN109 3-in-1 IoPhic Smoke, Carbon Monoxide and Natural Gas Smart Alarm

    Don't let emergencies sneak up on you, every home needs a smoke and carbon monoxide detector. Keep your family and friends safe with this preventative IoPhic Smoke, Carbon Monoxide and Natural Gas Smart Alarm. more

    $49.31 $35.75

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    Universal Security Instruments Hardwired Interconnected Smoke and Fire Alarm with Battery Backup

    Universal Security Instruments Hardwired Interconnected Smoke and Fire Alarm with Battery Backup

    Free Shipping on Over 500K Items!

    This USI Electric brand smoke and fire alarm has been redesigned to include more performance features than ever before. It provides improved nuisance alarm resistance. Nuisance alarms are the leading reason for intentionally disabled smoke alarms.... more

    $11.43

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    Universal Security Instruments USI-960 120V AC Relay Module for Smoke Alarm, 5A

    Universal Security Instruments USI-960 120V AC Relay Module for Smoke Alarm, 5A

    The USI Electric USI-960 Relay Module for Smoke and Fire Alarms is designed to control the external devices on USI Electric and Universal smoke alarms and/or fire alarms. This relay module is UL listed and controls lights, sirens, bells, electric... more

    $24.97 $8.33

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    Universal Security Instruments Hardwired Relay Module for Smoke and Fire Alarms

    Universal Security Instruments Hardwired Relay Module for Smoke and Fire Alarms

    Free Shipping on Over 500K Items!

    The USI Electric USI-960 Relay Module for Smoke and Fire Alarms is designed to control the external devices on USI Electric and Universal smoke alarms and/or fire alarms. This relay module is UL listed and controls lights, sirens, bells, electric... more

    $13.92

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    Universal Security Instruments MDS300-401 4-in-1 Value Pack, Includes Two Separate Alarms, Black

    Universal Security Instruments MDS300-401 4-in-1 Value Pack, Includes Two Separate Alarms, Black

    The Universal Security Instruments MDS300-401 4-in-1 Universal Smoke Sensing Alarm provides quadruple the protection with only two installations. This set comes with (1) MDS300 IoPhic Smoke and Fire Alarm and (1) MCND401 Plug-In Carbon Monoxide and... more

    $54.99

    FREE shipping

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    Electric 4-in-1 Universal Smoke Sensing (IoPhic) Hardwired Smart Alarm

    Electric 4-in-1 Universal Smoke Sensing (IoPhic) Hardwired Smart Alarm

    The Universal Security Instruments Electric MDSCN111 4-in-1 Universal Smoke Sensing Smart Alarm provides quadruple the protection with a single installation. This 120-volt AC alarm protects against four deadly household threats: fast-flaming fires,... more

    $54.97

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    M Series Plug-In Carbon Monoxide and Natural Gas Alarm with 9-Volt Battery Backup

    M Series Plug-In Carbon Monoxide and Natural Gas Alarm with 9-Volt Battery Backup

    The Universal Security Instruments Electric MCN400B Plug-In Carbon Monoxide and Natural Gas Smart Alarm is a 2-in-1 device that provides double the protection with a single installation. This dual-sensing alarm protects against two deadly household... more

    $28.34

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    10 Year Sealed Battery-Operated Carbon Monoxide Smart Alarm with Display Screen, As Shown

    10 Year Sealed Battery-Operated Carbon Monoxide Smart Alarm with Display Screen, As Shown

    The Universal Security Instruments MCD305SB Carbon Monoxide Smart Alarm provides 10 years of continuous protection against the silent killer - carbon monoxide. Perfect for new or replacement installations, this maintenance-free alarm is suitable for... more

    $44.07

    FREE shipping

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    USI USI-960 Relay Module for Smoke and Fire Alarms

    USI USI-960 Relay Module for Smoke and Fire Alarms

    Universal Security Instruments Relay Module for Smoke and Fire Alarms is compatible with most USI electric and Universal security smoke alarm models. Features form C dry contacts. Contacts activate when the alarm sounds. Contacts deactivate shortly... more

    $14.99

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    Homelectrical

    (1,000+)
    USI MI106S 2-in-1 Universal Smoke Sensing and Fire Smart Alarm with 10 year Sealed Battery

    USI MI106S 2-in-1 Universal Smoke Sensing and Fire Smart Alarm with 10 year Sealed Battery

    Universal Security Instruments 2-in-1 Universal Smoke Sensing and Fire Smart Alarm with 10 year Sealed Battery is a 2-in-1 universal smoke sensing and fire alarm. It responds quickest to fast flaming fires and 87% faster to slow smoldering fires. The... more

    $20.99

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    Homelectrical

    (1,000+)
    Universal Security Instruments 1204 Wire-In Smoke Alarm with Battery Backup

    Universal Security Instruments 1204 Wire-In Smoke Alarm with Battery Backup

    The USI Electric USI-1204 Hardwired Ionization Smoke and Fire Alarm responds quickly to fast-flaming fires to protect your family against deadly threats in the home. Perfect for new or replacement installations, the 120-volt AC hardwired alarm is... more

    $17.96

    FREE shipping

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    UNIVERSAL SECURITY INSTRUMENTS 2975 Ionization Smoke Alarm,9VDC G4521198

    UNIVERSAL SECURITY INSTRUMENTS 2975 Ionization Smoke Alarm,9VDC G4521198

    Ionization Smoke Alarm,9VDC more

    $13.68

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    UNIVERSAL SECURITY INSTRUMENTS MDS300401 Protection Value Pack 4in1 G4521310

    UNIVERSAL SECURITY INSTRUMENTS MDS300401 Protection Value Pack 4in1 G4521310

    Protection Value Pack 4in1 more

    $56.08

    FREE shipping

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    Universal Security Instruments USI-1122L 9 Volt Ionization Fire and Smoke Alarm with a 10-Year Lithium Battery

    Universal Security Instruments USI-1122L 9 Volt Ionization Fire and Smoke Alarm with a 10-Year Lithium Battery

    The USI Electric USI-1122L Battery-Operated Ionization Smoke and Fire Alarm responds quickly to fast-flaming fires to protect your family against deadly threats in the home. This alarm is operated by a 10 year lithium battery (included) that never... more

    $14.95

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    Universal Security Instruments USI-2430 Heat Alarm 135 Degree Fixed Temperature

    Universal Security Instruments USI-2430 Heat Alarm 135 Degree Fixed Temperature

    The USI Electric USI-2430 Hardwired Fixed Temperature Heat Alarm responds quickly to temperatures above 135-degrees Fahrenheit to protect your family against deadly threats in the home. Perfect for new or replacement installations, the 120-volt AC/DC... more

    $25.97 $10.00

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    Universal Security Instruments USI-1227L 9V Ionization Alarm with Larger Mounting Bracket

    Universal Security Instruments USI-1227L 9V Ionization Alarm with Larger Mounting Bracket

    The USI Electric USI-1227L Battery-Operated Ionization Smoke and Fire Alarm responds quickly to fast-flaming fires to protect your family against deadly threats in the home. This alarm is operated by a nine-volt battery (included) and is suitable for... more

    $9.81 $5.99

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    Universal Security Instruments USI-2413 120-Volt Ionization Smoke Alarm and Strobe Kit

    Universal Security Instruments USI-2413 120-Volt Ionization Smoke Alarm and Strobe Kit

    Don't let emergencies sneak up on you with this Universal Security Instruments USI-2413 120-Volt Ionization Smoke Alarm and Strobe Kit. It is a necessary component for every home. Keep your family and friends safe with this preventative 120-volt smoke... more

    $112.97 $43.46

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    USI Bedroom 2-in-1 Smoke and Fire Smart Alarm with 10 Year Sealed Battery & Universal Smoke Sensing Technology (MIB3050S)

    USI Bedroom 2-in-1 Smoke and Fire Smart Alarm with 10 Year Sealed Battery & Universal Smoke Sensing Technology (MIB3050S)

    The Universal Security Instruments MI3050SB 2-in-1 Smoke and Fire Smart Alarm provides 10 years of continuous protection against deadly threats in the home. New patented Universal Smoke Sensing Technology provides the benefits of both photoelectric and... more

    $15.47

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    USI Bedroom 2-in-1 Smoke and Fire Smart Alarm with 10 Year Sealed Battery & Universal Smoke Sensing Technology (MI3050SB)

    USI Bedroom 2-in-1 Smoke and Fire Smart Alarm with 10 Year Sealed Battery & Universal Smoke Sensing Technology (MI3050SB)

    The Universal Security Instruments MI3050SB 2-in-1 Smoke and Fire Smart Alarm provides 10 years of continuous protection against deadly threats in the home. New patented Universal Smoke Sensing Technology provides the benefits of both photoelectric and... more

    $15.47

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    USI Hallway 3-in-1 Smoke, Fire and Carbon Monoxide Smart Alarm with 10 Year Tamper-Proof Sealed Battery (MIC3510SB)

    USI Hallway 3-in-1 Smoke, Fire and Carbon Monoxide Smart Alarm with 10 Year Tamper-Proof Sealed Battery (MIC3510SB)

    The Universal Security Instruments MIC3510SB 3-in-1 Smoke, Fire and Carbon Monoxide Smart Alarm provides 10 years of continuous protection against deadly threats in the home. New patented Universal Smoke Sensing Technology provides the benefits of both... more

    $106.40 $70.93

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    USI 3-in-1 Hardwired Smoke, Fire & Carbon Monoxide Smart Alarm with 10 Year Tamper-Proof Sealed Battery (MIC1509S)

    USI 3-in-1 Hardwired Smoke, Fire & Carbon Monoxide Smart Alarm with 10 Year Tamper-Proof Sealed Battery (MIC1509S)

    The Universal Security Instruments hardwired MIC1509S 3-in-1 Smoke, Fire and Carbon Monoxide Smart Alarm provides 10 years of continuous protection against three deadly threats within the home. New patented Universal Smoke Sensing Technology provides... more

    $110.07 $73.38

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    Universal Security Instruments Hardwired Fixed Temperature Heat Alarm

    Universal Security Instruments Hardwired Fixed Temperature Heat Alarm

    Free Shipping on Over 500K Items!

    The USI Electric USI-2430 Hardwired Fixed Temperature Heat Alarm responds quickly to temperatures above 135°F to protect your family against deadly threats in the home. Perfect for new or replacement installations, the 120-Volt AC/DC hardwired alarm is... more

    $16.28

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    Universal Security Instruments Hardwired Interconnected Smoke and Fire Alarm with Battery Backup

    Universal Security Instruments Hardwired Interconnected Smoke and Fire Alarm with Battery Backup

    Free Shipping on Over 500K Items!

    This USI Electric brand smoke and fire alarm has been redesigned to include more performance features than ever before. It provides improved nuisance alarm resistance. Nuisance alarms are the leading reason for intentionally disabled smoke alarms.... more

    $19.99

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    Universal Security Instruments Battery Operated Smoke and Fire Alarm

    Universal Security Instruments Battery Operated Smoke and Fire Alarm

    Free Shipping on Over 500K Items!

    Microprocessor intelligence provides improved resistance to nuisance alarms caused by non-hazardous sources such as every day cooking smoke or steamy showers. Nuisance alarms are the leading reason for intentionally disabled smoke alarms. Working smoke... more

    $13.20

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    Universal Security Instruments Hardwired Interconnected Smoke and Fire Alarm with Battery Backup

    Universal Security Instruments Hardwired Interconnected Smoke and Fire Alarm with Battery Backup

    Free Shipping on Over 500K Items!

    Microprocessor intelligence provides improved resistance to nuisance alarms caused by non-hazardous sources such as every day cooking smoke or steamy showers. Nuisance alarms are the leading reason for intentionally disabled smoke alarms. Working smoke... more

    $17.93

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    Universal Security Instruments 120-Volt AC Hardwired Ionization Smoke and Fire Carbon Monoxide and Natural Gas Alarm with Battery Backup

    Universal Security Instruments 120-Volt AC Hardwired Ionization Smoke and Fire Carbon Monoxide and Natural Gas Alarm with Battery Backup

    Free Shipping on Over 500K Items!

    Universal Security 3-in-1 Smart Alarm uses a single sensor to detect both CO and Natural Gas. Microprocessor Intelligence provides superior nuisance alarm resistance, temperature and humidity compensation, self diagnostics and Quick Find alarm... more

    $36.00

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    Universal Security Instruments Plug-In Combination Carbon Monoxide and Natural Gas Alarm

    Universal Security Instruments Plug-In Combination Carbon Monoxide and Natural Gas Alarm

    Free Shipping on Over 500K Items!

    Single Installation. Double Protection. This compact plug-in alarm is perfect for new or replacement installations. Dual sensing alarm-provides protection against 2 deadly household threats: Carbon Monoxide and Natural Gas. This alarm is suitable for... more

    $26.91

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    Universal Security Instruments Battery-Operated Ionization Smoke and Fire Alarm

    Universal Security Instruments Battery-Operated Ionization Smoke and Fire Alarm

    Free Shipping on Over 500K Items!

    The Universal Security Instruments 2975 Battery-Operated Ionization Smoke and Fire Alarm responds quickly to fast-flaming fires to protect your family against deadly threats in the home. This alarm is operated by a 9-Volt battery (included) and is... more

    $9.59

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    Universal Security Instruments 10 Year Sealed Battery-Operated Carbon Monoxide Smart Alarm

    Universal Security Instruments 10 Year Sealed Battery-Operated Carbon Monoxide Smart Alarm

    Free Shipping on Over 500K Items!

    The Universal Security Instruments MC304SB Carbon Monoxide Smart Alarm provides 10 years of continuous protection against the silent killer - carbon monoxide. Perfect for new or replacement installations, this maintenance-free alarm is suitable for... more

    $26.64

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    Universal Security Instruments Plug-In 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm with Battery Backup (MCN400B)

    Universal Security Instruments Plug-In 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm with Battery Backup (MCN400B)

    The USI Electric MCN400 Plug-In Carbon Monoxide and Natural Gas Smart Alarm is a 2-in-1 device that provides double the protection with a single installation. This dual-sensing alarm protects against two deadly household threats: carbon monoxide and... more

    $30.20

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    Universal Security Instruments MI106 Hardwired Ionization Smoke and Fire Smart Alarm

    Universal Security Instruments MI106 Hardwired Ionization Smoke and Fire Smart Alarm

    The USI Electric MI106 Hardwired Ionization Smoke and Fire Alarm responds quickly to fast-flaming fires to protect your family against deadly threats in the home. Perfect for new or replacement installations, the 120-volt AC hardwired alarm is suitable... more

    $22.97 $18.41

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    Universal Security Instruments MP117 Photoelectric Smoke & Fire Smart Alarm

    Universal Security Instruments MP117 Photoelectric Smoke & Fire Smart Alarm

    The USI Electric MP117 Hardwired Photoelectric Smoke and Fire Alarm responds quickly to slow-smoldering fires to protect your family against deadly threats in the home. Perfect for new or replacement installations, the 120-volt AC hardwired alarm is... more

    $26.97 $17.93

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    Universal Security Instruments 5304L Hardwired Ionization Smoke and Fire Alarm with 10-Year Lithium Battery

    Universal Security Instruments 5304L Hardwired Ionization Smoke and Fire Alarm with 10-Year Lithium Battery

    The USI Electric 5304L Hardwired Ionization Smoke and Fire Alarm responds quickly to fast-flaming fires to protect your family against deadly threats in the home. Perfect for new or replacement installations, the 120-volt AC hardwired alarm is suitable... more

    $17.99

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    Universal Security Instruments MDS107 2-in-1 IoPhic Universal Smoke and Fire Smart Alarm

    Universal Security Instruments MDS107 2-in-1 IoPhic Universal Smoke and Fire Smart Alarm

    Don't let emergencies sneak up on you with the Universal Security Instruments MDS107 2-in-1 IoPhic Smoke and Fire Alarm. It is a necessary component for home safety. Use the Universal smoke alarm to keep your family and friends safe. It is made of... more

    $26.97 $18.99

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    Universal Security Instruments Battery-Operated Universal Smoke Sensing Smoke and Fire Alarm (MDS300B)

    Universal Security Instruments Battery-Operated Universal Smoke Sensing Smoke and Fire Alarm (MDS300B)

    The Universal Security Instruments MDS300B Smoke and Fire Alarm responds quickly to both fast-flaming and slow-smoldering fires to protect your family against deadly threats in the home. Perfect for new or replacement installations, the MDS300B is... more

    $16.25

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    Universal Security Instruments Battery Powered Smoke and Fire Alarm

    Universal Security Instruments Battery Powered Smoke and Fire Alarm

    Free Shipping on Over 500K Items!

    IoPhic Universal Smoke Sensing Technology alarms with microprocessor intelligence are designed to virtually eliminate nuisance alarms caused by non-hazardous sources such as every day cooking smoke or steamy showers. Nuisance alarms are the leading... more

    $20.82

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    Universal Security Instruments Hardwired Interconnected Smoke and Fire Alarm

    Universal Security Instruments Hardwired Interconnected Smoke and Fire Alarm

    Free Shipping on Over 500K Items!

    IoPhic Universal Smoke Sensing Technology alarms with microprocessor intelligence are designed to virtually eliminate nuisance alarms caused by non-hazardous sources such as every day cooking smoke or steamy showers. Nuisance alarms are the leading... more

    $16.99

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    Universal Security Instruments 120-Volt AC Hardwired Carbon Monoxide and Natural Gas Alarm with Battery Backup

    Universal Security Instruments 120-Volt AC Hardwired Carbon Monoxide and Natural Gas Alarm with Battery Backup

    Free Shipping on Over 500K Items!

    Universal Security 2-in-1 Smart Alarm uses a single sensor to detector both CO and Natural Gas. Microprocessor Intelligence provides superior nuisance alarm resistance, along with temperature and humidity compensation, self diagnostics and Quick Find... more

    $30.06

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