First Alert CO910 Carbon Monoxide Alarm, 3 V Duct Removes grout up to 3/8"

Removes grout up to 3/8" below the face surface of the tile

Can be placed over door or mounted directly to wall

Aggressive thread design increases holding power

Nickel-metal hydride battery

First Alert CO910 Carbon Monoxide Alarm, 3 V Duct Removes grout up to 3/8"Highlights: Color: White Volts: 3 Power Type: Battery Powered Sensor Type: Electrochemical Detects Carbon Monoxide: Yes Test and or Reset Button: Yes Indoor and Outdoor: Indoor End of life signal Alarm status LED indicator Electrochemical carbon monoxide sensor Versatile mounting options tabletop or wall Sealed lithium battery eliminates costly battery replacements UL Listed Number in Package: 1 Packaging Type: Clamshell