1) Working Current :                                                                               
a) Static Current:≤10µA                                                                           
b) Alarm Current: ≤12mA                                                                         
2) Operating Voltage: DC9V                                                                          
3) Audio Alarm : 85 Db at 10 feet.                                                         
4) Temp Range :14℉( -10℃) to147℉( 60℃)                                     
5) Humidity Range: ≤95%RH（40±2℃）                                                
6) Battery : 9V battery back-up for at least 1 year.
7) Protection area : 6 m high , 60 ㎡.                                                        
8) Latching alarm indicator remembers which unit initiated an alarm.
9) Smart sense system helps reduce unwanted alarms.  
10)Single button test/Silence.
11) Perfect mount system : Gasket less base allows for easy installation & positioning.
12)Dust cover keeps alarm clean during construction.  
13)Test button: electronically simulates smoke condition ,causing the unit to alarm.
14) Alarm reset: automatic when smoke clears . Press test/silence button 7)  to silence alarm manually.