Made of ABS material, strong, accurate, safe and durable in use. Contact keypad password lock, no keys needed. Factory settings: Management password: 1234, default home mode. When unlocked, the green indicator light will turn on. If the password is incorrect, an audible alert will sound. Suitable for use in schools, SPA/sauna centers, swimming pools, gyms, golf courses, supermarkets, hotels, offices, factories, homes, and businesses. Battery: Button battery (included). Instructions: Enable public mode 1. Enter the correct management password and press the OK button. The buzzer will emit a long beep and the unlocking light will stay on. 2. Press and hold the OK button for more than 2 seconds until the lock flashes, then press the OK button again. 3. Enter the numbers "4, 4" and press the OK button. A long beep will confirm activation. Set temporary password 1. Press the OK button. The unlock indicator will start flashing. 2. Enter a 4 to 15-digit password to be set. 3. Press the OK button. The buzzer will emit a long beep, the lock will open and save the password. The temporary password is now set. After entering standby mode, the electronic lock light will flash every 3 seconds. *The temporary password can only be used once and will automatically expire after use. Turn off public mode 1. Enter the correct management password and press the OK button. The buzzer will emit a long beep and the unlocking light will stay on. 2. Press and hold the OK button for more than 2 seconds until the lock flashes, then press the OK button again. 3. Enter the numbers "4, 3" and press the OK button. A long beep will confirm deactivation. Maximum installation thickness: L = 20mm Color: Black Material: ABS Size: 95 x 33 mm Package Contents: 1 x Code Security Lock 1 x Mounting panel 1 x Mounting nut 1 x Mounting screws Note: Light and display differences may cause slight color variations between the image and the actual item. Measurement error allowance: +/- 1-3 cm.