Item Type: Smart Door Lock Material: Aluminum alloy + stainless steel Applicable Scene: Home, hotel, apartment, homestay, office Battery Type: 4 AA batteries (not included) Power Supply: 4-7V Emergency Power Supply: External USB: 5-7V Quiescent Current: 50A Dynamic Current: 300mA Low Voltage Warning: 4.8V Working Temperature: -25-+65 Fingerprint Capacity: 100 pieces Package List 1 x Inner Door Machine 1 x Outer Door Machine 1 x Lock Body 1 x Gusset 1 x Buckle Box 3 x Screw 4 x Screw 1 x Spindle 2 x Key 2 x ID Card 3 x Expansion Tube 1 x Hole Map 1Security Door Lock: New technology of virtual password, antitracking and antisnooping. After the interior is locked, the outside door can only be opened with a mechanical key. 2High Sensitivity: The semiconductor fingerprint sensor automatically tracks the changes of the user's fingerprint, so as to keep the fingerprint recognition sensitive and effective, and the maximum fingerprint capacity is 100 pieces. 3ID Card Unlock: The magnetic card door can be opened with a touch, which is suitable for the elderly who often forget the password and relatives and friends who live temporarily. 4Louder Doorbell: The builtin doorbell has a builtin highdecibel speaker, which is louder than other smart locks with external speakers. There is also a voice reminder function. 5Free Handle: The handle is free to prevent violent unlocking. Press down and rebound smoothly. Before the recognition is passed, the handle is in a free state. After the recognition is passed, the handle can be unlocked by pressing the handle down. 6Long Durability: IMD panel, aluminum alloy shell, scratchresistant and wearresistant, longlasting as new, curved surface design, showing the beauty of technology.