Note: This product is a set of combination products, not detachable for use, please remove all your old parts and adopt all our new parts to work properly High Quality Safe Lock: High grade zinc alloy fire resistant keypad with swing bolt lock that is strong, durable, fire resistant, corrosion resistant, provides physical protection against forced entry, and offers a 3 error code locking mode Standard Size: 95mm (3.74 inch) round faceplate, weight 6.35 ounces, please remember to check the size to match your safe box before you buy, you can refer to our product instruction video Easy Operation & Installation: Open with 3-8 digital codes that can be programmed and 3 different colors of lights indicating different states. To replace the battery, remove the keypad face by pressing the tab counterclockwise Application: Our digital keypad security swing bolt lock replacement are suitable for home safes and lockboxes, pistol safes, hotel safes, cabinet safes, slot safes High Security Fireproof Safe Electronic Lock: Code Length: 6 digits Static current: 10u A Power Supply: One 9V Alkaline battery (not included) Battery life span: About one year Battery low voltage: 4.6 +-0.3V Working humidity: (max) 90% Bolt type: Solenoid Zinc Alloy internal moving part lock kit Actuation time: 5s