... FIVE DAYS UNDER BACKUP BATTERY,EASY TO INSTALL, METAL PROTECTION,PROFESSIONAL AND COST-EFFECTIVE,DIY,READY GO Ultra-long standby with ... backup batter (6V/4Ah)!DIY, Easy-to-use and operate.cost-effectived. remote keypad avaliable now.1. Wireless ... : >200m, indoor: 30~50m, (depend on the surrounding environment and wireless interference)4. Standby current: < 10mA5. Alarm volume:external siren ...