Features: brand new and high quality Easy to use, you open the door with your fingerprint or the set password or use the app to open the door, for smart and convenient. Easy to install, no need for power cords or professionals, suitable for most doors that use lever door locks, as well as suitable for left and right handles. Ergonomic design, fingerprints can easily open the door in one second, it will automatically lock for you to protect you and your family safety at all times. Energy saving design, no longer worry about pollution or wasting money, built in lithium battery, it can be used for one year when fully charged in 30 minutes. Unquestionable security, your fingerprint is unique in the world, and its security is beyond doubt, using the advantages of semiconductor technology and biological characteristics, the same fingerprint is avoided. Specifications: Material: Alloy Size: Approx. 16x6.5 for cm/6.30x2.56 inch Color: Black/Silver Package Includes: 1 Piece Fingerprint Door Lock note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.