Material: ABS Maximum installation thickness: L = 20 mm, B = 30 mm (optional) Battery: 3V button cell battery (CR2032) (not included) Size: 95 x 65 x 15 mm / 3.74 x 2.56 x 0.60 inches (approx.) Packing list: 1 x Code lock 2 x Screws 1 x Hex nut 1 x Spring bolt 1 x Fixing ring Instructions: Activate public mode 1. Enter the correct administration password \"****+OK \", the buzzer \"di... \" gives a long signal, the unlock light is always on. 2. Press the OK button again for more than 2 seconds, the lock flashes, press the OK button again. 3. Enter the numbers \"4, 4 \" and press the \"OK \" button, \"di ... \" a long signal. Set the temporary password 1. Press the \"OK \" button, the unlock indicator flashes. 2. Enter the 4~15 digit password to be set. 3. Press the OK button, the buzzer emits a long signal and the lock opens and saves. The temporary password has been set. After entering standby mode, the indicator light on the electronic lock flashes every 3 seconds. *The temporary password can only be used effectively once and it automatically becomes invalid after use.