Features 1,Unlock and Emergency Power Supply: Smart lock can be unlocked via password, key, fingerprint, and APP, with an emergency power interface to prevent battery depletion (battery not included). 2,Easy Replacement: Simply replace the lock core without disassembling the lock body or drilling holes, making installation quick and convenient. 3,Anti Peep Password: This cylinder lock supports virtual anti peep passwords, which greatly improves security by entering random passwords before and after the correct password. 4,Unlock Record: Download for TUYA APP, you can view the door opening record through the connection, so that you can keep track of the door. 5,Applicable Doors: The smart code lock is suitable for doors with a thickness of 40mm‑ 100mm, and is suitable for the installation of wooden doors, iron doors, security doors, etc Specification Item Type: Smart Keypad Lock Material: Aluminum Alloy Static Protection: 15KV Power Input: 3.65V Working Current: 135mA Standby Current: 10uA Pressure Resistance: 100,000 times Suitable Door Thickness: Approx. 40 100mm or 1.6 3.9in Compatible Door Types: Anti theft door, Wooden door, Glass door Lock Cylinder Size: A and B = 80mm or 3.1in APP: for TUYA Power Supply: 3 x 1.5V AAA Alkaline Batteries (Batteries not included) Package List 1 x Lock2 x Keys1 x Screwdriver1 x Suction Cup1 x Instruction Manual Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.