Gentex SR (917-0071-002) Smoke Alarm - Replaces S1209FThe S C SC H Series devices are for use as evacuation devices in all dwelling units, including but not limited to homes, apartments, hospitals, hotels and motels. The S C SC H Series is provided with a 9V alkaline battery for back up in the event building power is lost. The S C SC H Series smoke, CO, smoke CO and heat alarms are ANSI UL 217, ANSI UL 2034 and or ANSI UL 539 listed and are warranted for one year from date of purchase. Features S SR STRR