... phone numbers telephone alarm system,wireless alarm,home alarm,wireless alarm,home alarm system,mms home alarm,home security,wireless home alarm,burglar alarmDescription and ... the host be cut off, the host drives the alarm horn immediately. *Equip standby rechargeable battery.*While alarming, ... 220V, 50 or 60Hz, DC9V to 12VWorking hours of backup battery(DC7.2V): More than 6 hours.Working current:I1 ...