The Kidde C3010-D-CA is a 10-year sealed battery, carbon monoxide alarm which includes a digital display feature and uses electrochemical sensing technology to protect you and your family from the dangers of carbon monoxide. The C3010-D-CA alarm will automatically activate when it is attached to the mounting bracket. At the end of alarm life, the unit will chirp, indicating the alarm is in need of replacement. A screwdriver can be used to deactivate the unit, stopping the end-of-life chirp and making it safe for disposal. This easy-to-install alarm is suitable for all living areas and has a 10-year life and limited warranty. Model C3010D-CA Power Source Sealed 3V Lithium Battery Sensor Electrochemical Audio Alarm 85dB at 10ft Temperature Range 4.4˚C (40˚F) to 37.8˚C (100˚F) Humidity Range 10%-95% relative humidity (RH), non-condensing Size 11.8 cm width x 4.7 cm depth x 7.6 cm height Weight 0.14 kg Interconnects No Warranty 10-year limited