Made of ABS material, strong, precise, safe and durable in use. Contact keypad password lock, no keys needed. Cool to use. Factory mode: Management password: 1234, default home mode, When the green is unlocked, the indicator light is on, and if the password is incorrect, a sound is heard. Suitable for agent, school, SPA/sauna bath center, swimming pool, gymnasium, golf course, supermarket, hotel, company, factory, household, business lead, etc. Battery: button battery (included) Instructions: Activate public mode 1. Enter the correct management password \"****+OK\" button, the buzzer \"di...\" a long signal, the unlock light is always on. 2. Press the OK button again for more than 2 seconds, the lock flashes, press the OK button again. 3. Enter the numbers \"4, 4\" and press the \"OK\" button, \"di..\" a long signal. Set temporary password 1. Press the OK button, the unlock indicator flashes. 2. Enter the 4~15 password to be set. 3. Press the OK button, the buzzer beeps for a long time and the lock opens and is stored. The temporary password has been set. After entering standby mode, the light on the electronic lock flashes every 3 seconds. *The temporary password can only be used effectively once and automatically becomes invalid after use. Turn off public mode 1. Enter the correct management password \"+OK\" button buzzer \"di...\" a long signal, the unlock light is always on. 2. Press the \"OK\" button again for more than 2 seconds, the lock flashes, press the OK button again. 3. Enter the numbers \"4, 3\" and press the \"OK\" button, a long signal \"di...\". Maximum installation thickness: L = 20mm Color: black Material: ABS Size: 95 x 33 mm Package contents: 1 * Code Security Lock 1 * Mounting panel 1 * Mounting nut 1 * Mounting screws Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture to be a little different from the real thing. The allowed measurement error is +/- 1-3 cm.