[APP smart control]: Different from traditional lock cylinders, this cylinder has a built-in chip and can be paired with mobile phone Bluetooth. When paired with a Bluetooth gateway, it can be remotely controlled by mobile phone APP. You can unlock the door anytime and anywhere. [2-in-1 design]: The fingerprint sensing area and the password key area are integrated into one to meet the needs of different groups of people. [5 unlocking methods]: 1. APP remote unlocking. 2. Fingerprint sensing unlocking. 3. Password unlocking. 4. IC card unlocking. 5. Key unlocking. [100 fingerprint storage]: This door lock can store up to 100 fingerprints, far exceeding the 20-50 storage limit of other similar products. The fingerprint recognition rate is as high as 99.9percent , and it only takes 0.3 seconds to open the door, eliminating the trouble of forgetting to bring the key when going out. [No need to plug in, battery powered]: The fingerprint door handle requires 3 LR03 batteries (batteries are not included in the package). According to our test, the battery can be used for 12 months. There is a Type-C emergency charging port for emergency unlocking when the lock is out of power. No need to worry about being locked out. [Door opening record query]: You can view the record of smart door lock opening in the APP to know who opened it and when. You can also set a temporary password to better protect information and security. [60mm-90mm adjustable cylinder]: In order to adapt to doors of different thicknesses, the cylinder of this lock core is adjustable in length from 60mm to 90mm. [Linkage and alarm]: After connecting to the APP, you can set the linkage function with other smart devices. At the same time, you can receive alarms from the lock core, such as alarms for incorrect passwords. Notes: 1. The thickness of the door must be measured. 2. Applicable to symmetrical doors, the distance from the middle screw hole to the inside and outside of the door must be measured (the distance must be equal). 3. Measure the size of the lock core hole (it must be a European standard lock core hole). 4. This product is a mobile phone Bluetooth lock core and cannot be directly connected to the mobile phone via WiFi. It needs to be used with a gateway to achieve APP remote control. 5. When the distance from the middle screw hole of the cylinder to the inner lock plate is equal to the distance to the outer lock plate, you can purchase this lock core. Scanning time:less than 0.3 seconds Working temperature:-20-60 Unlock times:more than 200,000 times Maximum number of fingerprints stored:100 False recognition rate:0.001percent Power supply:3 x AAA LR03 battery(battery not included) Rejection rate:less than 0.001percent APP:Tuya/Smart life Colour:Black Material:Aluminum brass Package Contents: 1 * 1 * Epoxy Card 2 * Manual Key+Cupule 2 * Tools 1 * Reset Card Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.