Hush button(mute function) Test Button Auto reset ASIC adopted Anti-light, mothproof Strong adaptability for circumstance SMT design, high stability Technical specification: Operating voltage: 9V battery Static current: ≤10uA Alarm current: ≤15mA Alarm indication: Sound & flash alarm Sound level: ≥85dB/3 meters Operating temperature:40℉ to 100℉(4℃ to 38℃) Operating humidity: 5%-95% RH Sensitivity:2.06%/ft Detecting area: 20 square meters Alarm output: sound and flash alarm Size: 128 x 38mm deep Execute criterion:EN14604,UL217