... FIVE DAYS UNDER BACKUP BATTERY,EASY TO INSTALL, METAL PROTECTION,PROFESSIONAL AND COST-EFFECTIVE,DIY,READY GO Ultra-long ... *120 °horizontal+60°vertical10. Optional sensor: wireless smoke detector, gas leakage detector, vibration sensor, siren with strobe light, flashing siren, ... backup battery(6v/4A). one magnetic door sensor, one PIR detector, two remote controllers, one telephone line, one adaptor, ...