SITERWELL Hardwired Smoke Alarm 120V AC Wire-in Photoelectric Smoke Detectors and Fire Alarm with 9V Battery Backup (GS517)

?NOTE: WEEKLY TESTING IS REQUIRED. ?NOTE: Dense smoke will override the alarm silence and sound a continuous alarm. ?CAUTION: Before using the alarm silence (hush), identify the source of the smoke and be certain a safe condition exists. ?WARNING: The primary 120 V AC power is dangerous! When you replace battery, you must make sure the AC power is turned off. Feature ?UL, ACTIVEFIRE & INTERTEK approval ?Conforms to EN14604, UL217, AS3786 standard AC 120V with 9V battery backup Battery life : 1 year Silence Function Silence time : 10 minutes Loud>85dB (A) alarm signal @3M Low battery signal alarm Photoelectric smoke chamber Interconnect up to 12 pcs Flash alarm indicator(red) AC power indicator(green) Test button for easy recommended weekly testing Safety clip feature, not allow mounting of smoke alarm without battery installed Fault warning Standby indicator: Red LED flashes every 40 seconds Package included: 1*Hardwired Smoke Alarm, 1*9V Battery Backup, 1* User Manual, 2*Screws More detail see User Manual