Feature: 1. A easy-to-follow instruction would help you to install your intelligent door lock easier. You could adjust the handle as left-side or right-side as your favor. 2. No longer worry about forgetting or losing keys. You can easily open the door with one slight touching. 3. Your fingerprint is only one in the world, which guarantee the safety without doubt. Taking advantage of technology of semiconductor and biological characteristics is adopted, which avoids the same fingerprint. 4. Made of practical Zinc Alloy material. 5. Ergonomic design, easy for you to unlock the door within 1 second by putting your fingerprint on it. 6. Meeting the standards of most lever lock, Ball Door Knob. Specification: This product has 2 ways to open your door: fingerprint and mechanical key. Usually you can use your fingerprint to open the lock, convenient and quick, if the lock is out of power, you can use the key to open the lock, don't worry about being locked out. Features: A easy-to-follow instruction would help you to install your intelligent door lock easier. You could adjust the handle as left-side or right-side as your favor. No longer worry about forgetting or losing keys. You can easily open the door with one slight touching. Your fingerprint is only one in the world, which guarantee the safety without doubt. Taking advantage of technology of semiconductor and biological characteristics is adopted, which avoids the same fingerprint. Made of practical Zinc Alloy material. Ergonomic design, easy for you to unlock the door within 1 second by putting your fingerprint on it. Meeting the standards of most lever lock, Ball Door Knob. Specifications: Main color: black Material: zinc alloy Unlock mode: fingerprint+mechanical key Fingerprint Capacity: 200 Fingerprint read: semiconductor sensor Read time: ≤0.3S Working power: 4 * AAA battery (Not included) Suit for the door thickness: about 35-55mm Package size: 230 * 185 * 80mm / 9.1 * 7.3 * 3.1in Package weight: 940g / 2.1lb Packing List: 1 * Lock 2 * Mechanical Key 1 * Installation Tools Set Package List: 1 * Lock 2 * Mechanical Key 1 * Installation Tools Set