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 other commercial or public environments. 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 flash. 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 the password will be saved. The temporary password is valid for one use only and will automatically deactivate after use. After entering standby mode, the electronic lock light will flash every 3 seconds. Disable 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 variations between the product color in images and the actual item. Measurement may vary by +/- 1-3 cm.