Carbon Monoxide Alarm, Detection Method Electrochemical, No Interconnection Capability, Power Source 10 Year Sealed Battery, Audible Alert 85 dB @ 10 Feet, Visual Alert Style LED, Height 4 3/8 in, Depth 1 3/4 in, Width 2 1/2 in, Digital Readout No, Battery Backup No, Features Compact Design, Table Top or Wall Mount Installation, Hush Button Yes, Locking Pin No, Operating Temp. 40 Degrees to 100 Degrees F, Standards UL 2034, California State Fire Marshal, Includes Mounting Anchors and Screws. This item has been restricted from sale in the following state (s): []