Made of ABS material, strong, accurate, safe, and durable in use. Contact keypad password lock, no keys needed. Cool to use. Factory settings: Management password is 1234, default home mode. When unlocked, the green indicator light will turn on. If the password is incorrect, the device will sound an alert. Applicable for use in offices, schools, SPA/sauna centers, swimming pools, gyms, golf courses, supermarkets, hotels, companies, factories, households, 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 "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. 3. Press the OK button. The buzzer will emit a long beep, the lock will open, and the password will be stored. The temporary password is set successfully. After entering standby mode, the electronic lock light will flash every 3 seconds. *The temporary password can only be used once and will automatically become invalid 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 "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 Only the above package content is included; other products are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3 cm.