KIDDE P4010ACSCOWCA Smoke and Carbon Monoxide Alarm Wireless Talking 120 VAC

120 VAC Wireless talking smoke and carbon monoxide alarm with 10-year sealed battery backup. Wireless Interconnect - Proprietary radio signal joins multiple alarms together, so when one alarm sounds they all sound. 10-Year Sealed-in Lithium Battery - No battery replacement required over the 10 year life of the alarm. Voice Notifications - Unit verbally announces "Fire!", "Carbon Monoxide" and other alerts such as "Replace Alarm," which helps the user better understand current status of the unit. Alarm Locate Feature - Quickly find initiating alarm by silencing other alarms in the network. Photoelectric Sensor - Smoke alarm contains advanced photoelectric sensor that may detect visible particles (associated with smoldering fires) sooner than ionization alarms. Hush - Will temporarily silence nuisance alarms and will not allow hush mode to be activated unless the unit is in alarm mode.