How to Use: To install according to the instructions, you need to install four AAA batteries (not included), please refer to the detailed instructions for details. Specification: Item Type: Smart Door Lock Material: Zinc Alloy Colour: Black Battery Type: 4 AAA batteries required (not included) Unlocking Method: Fingerprint, password, mechanical key Unlock Time: 1.5s Number Of Fingerprints: 50 Number Of Passwords: 100 groups Scope Of Application: Ideal for home, office, hotel, apartment, etc. Package List: 1 x Front Handle 1 x Rear Handle 1 x Lock Tongue 1 x D Pinch Plate 1 x Buckle Cover 2 x Key 1 x Square Strip 2 x Headless Screw 2 x Connecting Tube 2 x Front and Rear Panel Lock Screws 4 x Self Tapping Screw 1 x Battery Cover Replacement Screw 1 x Screwdriver 1 x Manual