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Whole-home interconnection — maximum of 24 Kidde devices of this type can be interconnected; when one alarm sounds, they all do. Hardwired smoke detector with battery backup — provides reliable detection, even during a power outage.



120v ac, all kidde brand hard wired smoke alarms are interconnectable with the KN-COSM-IBA. Test-hush feature - silences the unit for approximately 9 minutes; tamper-resistant technology deters removal of the unit from the wall or ceiling.


1. Universal Security Instruments
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Model 5304, Universal Security Instruments Hardwired Ionization Smoke and Fire Alarm with Battery Backup
#adUniversal Security Instruments #ad - Comes with a ten-year limited warranty. Universal mounting bracket fits any standard wiring junction box, single gang, round or octagon, up to 4-inches. Patented quick find alarm origination easily identifies the first alarm to sound in interconnected systems.More information #ad
Temperature range:40º f to 100º F 4º C to 38º C. Fully interconnectable with up to twenty-four USI-compatible devices. Front-loading battery drawer makes it easy to replace battery without removing the alarm from the bracket.Brand | Universal Security Instruments #ad |
Manufacturer | Universal Security Instruments #ad |
Height | 5.75 Inches |
Length | 1.75 Inches |
Weight | 1 Pounds |
Width | 5.75 Inches |
Part Number | 5304 |
Model | 5304 |
Warranty | 3 Years |
More information #ad
2. Universal Security Instruments
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USI Electric MICN109 Hardwired 3-in-1 Smoke, Carbon Monoxide and Natural Gas Alarm
#adUniversal Security Instruments #ad - Features a quick activation pull-tab and a front-loading battery drawer for replacement without removing the alarm from the bracket. 3-in-1 alarm provides triple the protection with a single installation to protect against fires, carbon monoxide and natural gas.More information #ad
Mount the bracket to any standard wiring junction box and use the large mounting base to cover imperfections in drywall. 120-volt ac/dc hardwired alarm with backup battery is suitable for houses, apartments and mobile homes. Comes with a 7 year limited warranty.Brand | Universal Security Instruments #ad |
Manufacturer | Universal Security Instruments #ad |
Height | 5.5 Inches |
Length | 5.5 Inches |
Weight | 0.6 Pounds |
Width | 1.75 Inches |
Part Number | MICN109 |
Model | MICN109 |
More information #ad
3. Kidde
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Kidde Smoke Detector, Hardwired Smoke Alarm with Battery Backup & Interconnect Capability
#adKidde #ad - Large base makes mounting easy, while a front battery pull tab lets you activate the smoke alarm without removing it from the mounting bracket.Whole-home interconnection — maximum of 24 Kidde devices of this type can be interconnected; when one alarm sounds, they all do. Hardwired smoke detector with battery backup — provides reliable detection, even during a power outage.
More information #ad
Ionization sensing technology — detects invisible fire particles associated with flaming fires quickly and sounds an 85dB alarm. Hush button — quickly and easily silence false or “nuisance” alarms from things like routine cooking or shower steam. Ul listed, 10-year limited warranty.Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 6 Inches |
Length | 2 Inches |
Weight | 0.74 Pounds |
Width | 6 Inches |
Part Number | 21029727 |
Model | I12040A |
Warranty | 5 Year Limited |
More information #ad
4. Kidde
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Front-Load Battery Door, Test-Silence Button, Hardwired Smoke Alarm with Battery Backup, Kidde Smoke Detector
#adKidde #ad - Ionization sensing technology - hardwired smoke detector senses invisible fire particles, 85 decibel alarm alerts of fire. Still works during power failures - smoke alarm with battery backup operates on a 120V power source with 9V battery included.More information #ad
Easy to install & front-load battery door makes for quick battery replacements. Ul certified, 10-year limited warranty. Test-hush button - it’s simple to test or hush false alarms by pressing the button right on the face of the device.Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 6 Inches |
Length | 6 Inches |
Weight | 0.5 Pounds |
Width | 2 Inches |
Part Number | 21029730 |
Model | i12060A |
Warranty | 5 Year Limited |
More information #ad
5. Universal Security Instruments
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Model MI106, Universal Security Instruments Hardwired Ionization Smoke and Fire Alarm with Battery Backup
#adUniversal Security Instruments #ad - Interconnectable with all USI-brand 120V alarms using existing wiring. Dual ionization-sensing chamber responds quickly to fast-flaming fires. Comes with a ten-year limited warranty.More information #ad
Ambient condition compensation adjusts sensitivity based on temperature and humidity, reducing nuisance alarms. Patented quick find alarm origination easily identifies the first alarm to sound in interconnected systems.Brand | Universal Security Instruments #ad |
Manufacturer | Universal Security Instruments #ad |
Height | 5.75 Inches |
Length | 1.75 Inches |
Weight | 0.5 Pounds |
Width | 5.75 Inches |
Part Number | MI106 |
Model | MI106 |
Warranty | 10 Years |
More information #ad
6. Kidde
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Hardwired, Voice Alert, Interconnect Combination Smoke & CO Alarm with Battery Backup, Kidde Smoke & Carbon Monoxide Detector
#adKidde #ad - Protects during a power failure - combo smoke and CO detector operates on a 120VAC power source with 2-AA battery backup. Meets safety standards set by Underwriters Laboratories UL and interconnects with other KN-COSM-IBA models.120v ac, all kidde brand hard wired smoke alarms are interconnectable with the KN-COSM-IBA. Test-hush feature - silences the unit for approximately 9 minutes; tamper-resistant technology deters removal of the unit from the wall or ceiling.
More information #ad
Ionization sensing technology - hardwired smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire. Fire & co detector in 1 unit with alert modes, "warning! Carbon Monoxide!", "fire! fire!", LED lights, that states, & voice alarm, or "Low Battery!". Ul certified, 10-year limited warranty.Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 6 Inches |
Length | 2 Inches |
Weight | 1 Pounds |
Width | 6 Inches |
Part Number | 21026041 |
Model | KN-COSM-IBA |
Warranty | 10 Year Limited |
More information #ad
7. Universal Security Instruments
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Universal Security Instruments USI-1204 University Security Instruments Electric 1204 Hardwired Ionization Smoke & Fire Alarm | 120-Volt Fast Responding Alarm, Comes with Backup Battery
#adUniversal Security Instruments #ad - 120-volt | ac hardwired alarm with backup Battery is Suitable for Houses, Apartments and Mobile Homes. Features | convenient silencer button for Non-Hazardous Alarms - Smart Interconnect to Connect up to 18 Units.More information #ad
Easy read | red led light flashes when smoke is Detected and the Green LED Light Indicates that Power is Functioning. Quick response | ionization smoke and fire alarm responds Quickly to Fast-Flaming Fires to Protect your Family against Deadly Threats in the Home.Brand | Universal Security Instruments #ad |
Manufacturer | World & Main, LLC #ad |
Height | 5.31 Inches |
Length | 5.31 Inches |
Weight | 0.5 Pounds |
Width | 2 Inches |
Part Number | USI-1204 |
Model | USI-1204 |
More information #ad
8. Kidde
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Voice Alert, Kidde Smoke & Carbon Monoxide Detector, Battery Powered, Combination Smoke & CO Alarm
#adKidde #ad - Ul certified, 10-year limited warranty. Carbon Monoxide. Fire. Protects during a power failure - combo smoke and CO alarm operates on 2-AA batteries. Test-hush feature - silences the unit for approximately 8 minutes; tamper-resistant technology deters removal of the unit from the wall or ceiling.More information #ad
Ionization sensor technology - smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire. Fire. Or "low Battery. ". Fire and co detector in 1 unit with alert modes, and voice alarm, that states, LED lights, "Warning.Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 5.6 Inches |
Length | 1.8 Inches |
Weight | 0.8 Pounds |
Width | 5.6 Inches |
Part Number | 21026043 |
Model | KN-COSM-BA |
Warranty | 5-year limited warranty |
More information #ad