Smart Door Handle with Fingerprint Lock Door Handle with Fingerprint Lock: Built-in fingerprint reader, touch-sensitive semiconductor technology for fingerprint identification. Fingerprint unlocking makes your life safer and easier. USB Charging Hole: Intelligent charging, simple and convenient. Charging can be done with a standard USB cable (charging port located at the end of the handle). Always On/Off: Always on and always off modes can be switched by yourself. Always On: All fingerprints can open the door. Create your own style. Easy to Install: Fits most doors that use a door handle, no wiring required, you can install it yourself. Invisible Keyhole: Mechanical key, retains the traditional way of unlocking. Free Installation Direction: Free handle suitable for left and right door opening. Low Battery Warning: When the battery is low, it will remind you to replace the battery. Long Battery Life: 1 year of normal use, easy to replace the battery. Super Quality: Made of high-quality zinc alloy, strong and stable. Product Name: Fingerprint Door Handle Unlocking Method: Fingerprint Fingerprint Capacity: 20 groups Power Supply: 4 "AAA" batteries (not included) Standby Time: 365 days Emergency Power Supply: USB charging (Micro-USB cable not included) Unlocking Method: Fingerprint, Key Unlocking Speed: 0.5s Finger Angle: 360° Material: Zinc Alloy + Stainless Steel Item Size: Approx. 160 * 65 * 27 mm