1Made of zinc alloy, it is durable and can be used for a long time. 2Safe and reliable, fingerprint identification lock, convenient fingerprint setting, safe. 3Easy-to-open fingerprint lock, the lock can recognize 30 fingerprints at the same time, and the recognition speed is 0.25 seconds. 4USB charging port, fingerprint door lock is powered by 4x dry AAA batteries (not included). 5Each fingerprint lock is equipped with 2 mechanical keys, allowing users to unlock using traditional methods. Item Type: Smart LockMaterial: Zinc AlloyWeight: Approx. 911g / 32.1ozColor: BlackPort: USB portBattery: 4xAAA Dry Battery (Not Included) Battery installation location, the rear handle, screwdriver can be installed to install the battery.Working Temperature: -20-55CTime Recognition Time: 0.25sFingerprint Capacity: 30pcsAdjustable Center Distance: Maximum Approx. 70mm/7.76inDoor Lock Installation:1. Fix the spring bolt (C), pressure plate and buckle cover with self-tapping screws on the door where the corresponding hole is opened.2. Tighten the flat head screw (G) and the connecting pipe (H) to the front handle panel (A) in turn. Insert the square rod (F) into the square hole of the front handle (A) through the power cord.3. Install the front handle assembled with accessories on the door, square pole (F) and square hole, and pass the power cord through the spring bolt.4. Loosen the cover screw (B-1) of the rear handle (B), and then remove the battery box on the rear cover (B-2)5. Install the rear handle (B) on the door, and insert the power cord of the front handle and the square hole of the rear handle into the place where the square rod passes. Tighten the rear handle and the front handle with the locking screws I of the front and rear plates.6. Insert the power cord into the back cover (B-2). Install 4 AAA alkaline batteries.7. Insert the extra power cord into the rear handle, close the rear cover (B-2), tighten the cover screw (B-1) of the rear cover, and the installation is complete. At this point, you can set the buttons to enter the administrator and user through the small holes on the handle(Please refer to the operation manual), please refer to the manual for detailed assembly drawings. 1 x Front Handle1 x Rear Handle1 x Spring Bolt1 x Splint Buckle Lid2 x Key1 x Square Rod2 x Flat Head Screw2 x Front and Rear Panel Lock Screws4 x Fixing Screw1 x Screwdriver1 x Door Lock Buckle1 x Manual Please note that the old and new type of the product will be sen randomly, and make sure you will not mind before ordering.