Features:1. Material: Made of zinc alloy material, durable and sturdy to use.2. Safe and Reliable: Fingerprint recognition lock, convenient fingerprint settings,safe and secure.3. High Efficient: The lock can recognize 30 fingerprint and the recognition speed is 0.25s.4. Power Supply: The fingerprint door lock powered by 4pcs x AAA dry batteries(not included), and meanwhile with USB charge port for emergency.5. With 2 Keys: Each fingerprint lock is equipped with 2 mechanical keys, which will enable users to unlock in traditional method.6. Biometric lock: Using biometric fingerprint technology, the door can be unlocked by fingerprint in only 0.25s, which is safe and reliable.7. Large capacity: The smart lock can store 30 fingerprints and can be opened easily and conveniently.8. Wide range of uses: Made of high-quality zinc alloy, strong and durable, suitable for families, apartments, personal residences, hotels, etc.Specification:- Material: Zinc Alloy- Color: Black- Port: USB - Interface: 4 X AAA dry batteries(not including)- Working temperature: -20-55C- Recognition time: 0.25s- Fingerprint capacity: 30- Adjustable center distance: Up to 70mm/2.75"- Size: 14.5 X 6.5 X 2.8cm/5.7 X 1.1 X 2.55inch (L x W x H)- Weight: 912g/32.17ozPackage Includes:1 x Fingerprint Door Lock 2 x Keys1 x Installation Accessories Package1 x Packing BoxNote:1. Please allow 1-3cm (0.4-1.18") difference due to manual measurement and slight color variation for different display setting.2. Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand.