Smoke Alarm,12/24 VDC, 4-Wire,Therm Sen, Mfr#: 4WTA-B, SYSTEM SENSOR

Smoke Alarm, Detection Method Photoelectric, Yes Interconnection Capability, Power Source 12/24V DC, Four-Wire, Audible Alert 85 dB @ 10 ft, Visual Alert Style LED, Diameter 5 19/64 in, Height 2 in, Digital Readout No, Battery Backup No, Features Drift Compensation and Smoothing Algorithms, Dual-Color LED, Thermal Sensor, Hush Button No, Locking Pin No, Operating Temp. 32 Degrees to 100 Degrees F, Standards UL, CSFM, Includes Base, Manufacturers Warranty Length 3 yr, Battery Location No Battery