Interlogix 13-444 System Sensor Smoke Detector - Low Profile

System Sensor Smoke Detector - Low Profile, White: Model BK-2100TD 2-Wire Photoelectric 12/24VDC Form C w/Thermistor. The 13-444 from Interlogix is a Designed to be used for profile applications. with white colored finish, and features 2 wire thermistor help providing high operation within most easy install, affordable operator.