Kidde P4010DCS-W Wire-Free Interconnected Battery Powered Smoke Alarm With Sealed Lithium Batteries

10-Year sealed lithium battery eliminates late night battery chirp Flashing LED status ring lets easy identification of current state of alarm Supervised interconnect is wire-free Contains advanced photoelectric sensor that may detect visible particles (associated with smoldering fires) sooner than ionization alarms Can be installed easily  Kidde Wire-free interconnected battery powered smoke alarm offers noise level of 85 dB at 10 ft. It incorporates photoelectric smoke sensor for efficient operation. This alarm is wall or ceiling mountable. It works with sealed lithium batteries. It has piezoelectric type horn and flash LED display. It has a dimension of 5.59 Inch Dia x 1.91 Inch. It operates at temperature range of 4.4 to 37.8 deg C. It offers interconnection with up to 24 kidde devices. It is compatible with RemoteLync bridge. Smoke alarm is UL listed.