kangten NEW Handle Smart Door Knob Fingerprint Biometric Digital Code Door Lock

It is suitable for the door with a thickness of 1-3/8 inches (35mm) to 2-3/16 inches (55mm). This product can be widely used in wooden doors, homes, closets, interior doors, hotels, bedrooms, studies, offices, apartment buildings, etc. Specification Color:  Black Material:  Zinc Alloy Surface Treatment: Painting Style: Modern Shape: Rectangular Control Method: Touch Lock Type: ‎Keypad Lock Capacity: 50 Sets of Fingerprints and 100 Sets of Passwords Power Supply: 4*AAA Batteries(Not Included, 4 * AAA batteries need to be purchased by oneself ) Capacity of Battery: 2200mAH Service Life of Battery: 8000-10000 Times Charge Port: USB Suitable Door Thickness: 1-3/8 inches (35mm) to 2-3/16 inches (55mm) Net Weight: 0.8kg/1.7lbs Gross Weight: 1kg/2.2lbs Product Size: 15.00cm*6.50cm*6.50cm/5.9*2.5*2.5inch Package Size: 21.8*17.8*7.3cm/8.58*7.01*2.87inch Package Included 2* Door Locks 1* English Manual 2* Keys All Accessories for Installation How to Add a Fingerprint A:  Add users for the first time: 1. Press the setting key and the blue light flashes. 2. Press your finger 5 times until the green light is always on. 3. Successful entry and automatic exit.   B: Add users for the second time. 1. Press the setting key. 2. The blue light flashes. 3. Verify the administrator once. (The first three fingerprint users of the door lock are administrators, and the fourth and subsequent fingerprints are ordinary users.) 4. The verification is successful and the blue light is always on. 5. Enter a new fingerprint, press your finger five times, and the green light is always on, indicating success.   How to Delete a Fingerprint 1. Press and hold the setting key for 9 seconds. 2. The blue light flashes, and the red light flashes after 9 seconds. 3. Release your hand, and the green light indicates that the factory reset is successful.   Notes Please carefully confirm the size of the door before purchase. Please install it in strict accordance with the instructions. Please make sure that the positive and negative poles of the battery are installed correctly to avoid short-circuit damage to the circuit board. Our lock's default status is to unlock with any fingerprint! If you find that you could unlock the door with any finger after setting your fingerprints, that means you have not programmed a fingerprint successfully,  or contact our service team. After registering your first fingerprint, please use the unregistered fingerprint to check if it can be unlocked or not, if yes, that means you do not register the fingerprint successfully and need to register it again following the user guide. Fingerprints are not easily recognized when there are water or oil stains on the fingers. Please avoid water and oil stains on your fingers when using the lock. Please note that the door lock log and remote view reminder functions need to be used with devices that have both Bluetooth  Please allow the slight color difference caused by the shooting light and 1-3cm error due to manual measurement, and make sure you do not mind before ordering.