Material: ABS Maximum installation thickness: L=20mm, L=30mm (optional) Battery: 3V button battery (CR2032) (not included) Size: 95 x 65 x 15 mm / 3.74 x 2.56 x 0.60 inches (approximately) Packaging list: 1 x Lock 2 x Screw 1 x Hex bolt 1 x Spring pin 1 x Retaining ring Instructions: Activate public mode 1. Enter the correct administrator password "****+OK", the summer "di..." pipes for a long time, the unlock light always glows. 2. Press the OK button again for more than 2 seconds; the lock blinks; press the OK button again. 3. Enter the numbers "4, 4" and press the "OK" button; "di ..." pipes for a long time. Set temporary password 1. Press the "OK" button; the unlock indicator blinks. 2. Enter password 4~15 to set. 3. Press OK button; the summer pipes once and the lock opens and saves. The temporary password has been set. When you enter standby mode; the electronic lock indicator light blinks every 3 seconds. *The temporary password can only be used effectively once and becomes automatically invalid after being used.