Slim Touch Screen Display Keypad Register up to 70 RFID Tags or Password Double Locking Function (Can be programmed to use password to unlock the lock) Emergency 9V Battery Terminal (When battery is flat, a 9V battery can be used to temporarily power up the lock) Auto Lock Function (Can be programmed to lock automatically when door is closed) Built-in burglar and fire alarm (Alarm will go off when there is a fire or when the lock is forced open) Password 4 ~ 12 digit number combination RFID Card / Password Capacity 71 (max.) Mechanical Key 2 Mechanical Key Door thickness 35 ~ 55 mm (1.4 ~ 2.2”) Power DC 6V (AA Alkaline Batteries) x 4 Battery life Approximately 24 months (Average - 10 times per day)