... 3) factory direct price HOT on sale Wireless Alarm System with Built-in Rechargeable Battery Auto Dial alarm burglar alarm system Functions ... : 220V AC, 10% 9V DC, and 300mA Backup battery: NiNH rechargeable battery, 7.2V DC 270mAh Working current: LS = 45mA Alarm ... alarm: 0 Standard package: one control panel, one per, one wireless door contact, one wired siren, 2 remote control, and one ...