Features: Made of zinc alloy, sturdy and durable. Cloud backup service. When the accident happens, there is no need to worry that the door can not be opened and the data is safe. Pass word protect funtion. You can input many digits before and after your code to open the door, for example, your code is 666666, you can input 12352+666666+98658 to open the door to advoid password being cracked. Bluetooth APP mobile phone unlocking, more secure than WiFi unlocking. More convenient, no need to worry about missing keys. Intelligent attendance. Employee attendance information is transmitted to management backstage in real time.Once the employee leaving office, the key is deleted in one second. Password sharing. Administrators can share key codes to friends and relatives through multiple social software. Intelligent remote control. Support opening door and sending temporary password and time password via mobile phone at any time. Multiple ways of unlocking for your selection: mobile phone, password and TF card. Specifications: Material: Zinc Alloy Door Opening Mode: Mobile Phone / Password / Access Card Security: Cloud Data Encryption Data Storage: Cloud Server, Encrypted Storage Form: Double Open / Single Open Adaptation Mode: Bolt / Magnetic Force Output Power: 220V power Size: 11.5*7.5*2.2cm/4.5*3.0*0.9in Package Weight: 155g/5.5oz Package List: 1 * Bluetooth Access Control Lock (Battery Not Included) 1 * Conecting Line 1、Bluetooth APP mobile phone unlocking, more secure than WiFi unlocking. More convenient, no need to worry about missing keys. 2、Intelligent attendance. Employee attendance information is transmitted to management backstage in real time.Once the employee leaving office, the key is deleted in one second. 3、Password sharing. Administrators can share key codes to friends and relatives through multiple social software. 4、Intelligent remote control. Support opening door and sending temporary password and time password via mobile phone at any time. 5、Multiple ways of unlocking for your selection: mobile phone, password and TF card.