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 turns on. If the password is incorrect, an alert sounds. Suitable for use in schools, spas, saunas, swimming pools, gyms, golf courses, supermarkets, hotels, offices, factories, households, and other commercial or public facilities. Battery: Button battery (included). Instructions: Enable public mode: 1. Enter the correct management password and press the "OK" button. The buzzer emits a long beep and the unlocking light stays 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 "4, 4" and press the "OK" button. A long beep will confirm activation. Set temporary password: 1. Press the "OK" button. The unlock indicator light flashes. 2. Enter a 4 to 15-digit password to be set. 3. Press the "OK" button. The buzzer emits a long beep, the lock opens, and the password is stored. The temporary password is set successfully. After entering standby mode, the electronic lock light flashes every 3 seconds. *The temporary password can only be used once and becomes invalid after use. Disable public mode: 1. Enter the correct management password and press the "+OK" button. The buzzer emits a long beep and the unlocking light stays 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 "4, 3" and press the "OK" button. A long beep confirms deactivation. Maximum installation thickness: L = 30mm 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 in color between the image and the actual item. Measurement error is +/- 1-3 cm.