Powerful door lock with smart adds "KongCheck Gate" for easy access control.   Kong Checkgate is a completely new type of door lock. With BLE5.0 technology, you can escape unnecessary actions such as password input, card tag, fingerprint recognition. Door locks installed at the front and back of the door extract the correct signal strength from the smartphone, and automatically unlock the device to classify the authorized person.   Now go through the door with your smartphone. If you use th