Features 1、EASY TO USE: Fingerprint unlock with just one grip. Grasp the handle to accurately identify fingerprints. When pressing down on the handle, the lock can be easily unlocked and the door can be opened at home in one go. 2、REMOTE SENDING OF TEMPORARY PASSWORD: APP can generate a one time password at any time and send it to temporary visitors, set the effective time, so that visitors can access more easily. 3、ANTI PRYING ALARM: Safety anti prying alarm can defend the safety of the home, and the lock emits an alarm sound. 4、IC CARD OPENING: Suitable for the elderly, convenient and safe. When the fingerprints of special populations such as the elderly, children, and finger injuries cannot be recognized, you can carry a smart card and use the card to open the door. 5、INTEGRATED STRUCTURE: Simple and durable design, with 4 x AAA batteries(not included) for long lasting battery life, and proactive reminders when the battery is low; When the power is exhausted, the mechanical key can be used to open the door, or the power bank can be connected to the micro USB at the bottom of the smart lock for temporary power supply. Specification Item Type: Smart Fingerprint Lock Material: ABS, Aluminum Alloy Power Supply: AAA battery x 4 is required (shipped without battery) Maximum Number of Fingerprints: 50 sets Maximum Number of IC Card Sets: 100 sets Unlock Method: Fingerprint, password, app, card, mechanical key Applicable Indoor and Outdoor Door Types: Anti theft door, wooden door, stainless steel door, copper door Applicable Door Thickness: Approx. 30 to 100mm / 1.18 to 3.94in Package List 2 x Lock 2 x IC Card 2 x Key 2 x Screw Tube 10 x Screw 1 x Safety Switch 1 x Iron Sheet 2 x Iron Rod