Features: 1.3 in 1 Smart Lock: Fingerprint recognition, password and mechanical key 3 unlocking methods. Support garbled unlocking to prevent peeping, suitable for door thickness 30?65mm. 2.Fast Fingerprint Recognition: Built in latest fingerprint recognition module, fingerprint recognition within 1.5S, up to 100 fingerprints can be stored. (Only recognize living fingerprints, reject fake fingerprint films.) 3.Low Voltage Alarm: Low power consumption function, when the voltage is lower than 4.8V, the low voltage prompt will remind you to replace the battery. 4.Emergency Power: If the battery of our smart door lock is low, you can temporarily charge your security lock with a power bank, phone charger, any power source with a Micro USB port. 5.Easy to Use: Make your life safer and more convenient, support up to 100 fingerprints and 100 sets of passwords. Can identify dry and wet fingerprints, suitable for children and the elderly. specification:Item Type: Smart Door Lock Material: Zinc Alloy Colour: Black Battery Type: 4 AAA batteries required (not included) Unlocking Method: Fingerprint, password, mechanical key Unlock Time: 1.5s Number Of Fingerprints: 100 Number Of Passwords: 100 groups Scope Of Application: Ideal for home, office, hotel, apartment, etc. PackageList: 1 x Front Handle 1 x Rear Handle 1 x Lock Tongue 1 x D Pinch Plate 1 x Buckle Cover 2 x Key 1 x Square Strip 2 x Headless Screw 2 x Connecting Tube 2 x Front and Rear Panel Lock Screws 4 x Self Tapping Screw 1 x Battery Cover Replacement Screw 1 x Screwdriver 1 x Manual