We discount for large quantity. Welcome to contact with us Simple Installation: No cord and no professional are needed. It fits most doors that uses lever door lock and is applicable to both left and right handle. Easy Operation: You can not only unlock the door with your fingerprint or the code you set, but also can open the door with APP, very smart and convenient. Indubitable Safety: Your fingerprint is unique 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. What's more, made of durable Zinc Alloy material, its quality is reliable. One-step Accessing: Ergonomic design, easy for you to unlock the door within 1 second by putting your fingerprint on it. It will lock for you automatically, keeping you and your home security all the time. Energy-saving Design: No more worry about pollution or wasting money. With built-in lithium battery, it can be used for a year after being fully charged for 30 minutes.(The charging interface is on the end of the handle.) Versatile Lock: Meeting the standards of most lever lock, you can fix it on your door which the thickness of the door is 35-55mm. Specifications: Product Name: Fingerprint Lock Model: WF-016 Unlock Mode: Fingerprint, Password, App(Bluetooth) Fingerprint Capacity: 20 groups Fingerprint Senor: FPC Semiconductor Standby Time: 500 Anti-static: 8kv-15kv Fingerprint Acquisition Time: less than or equal to 0.5s Working Temperature: -20-65 Working humidity: 0-90%RH Finger Angle: 360 Charging: Mirco-USB (Micro-USB Cable Is Not Included.) Battery: 3.7V lithium battery (1450) Service life: more than 5000 Times Colour: black Material: metal Package Contents: 1 x Fingerprint Door Lock Set Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.