Single Handle Smart Fingerprint Door Handle With Open Handle https://www.smartlockfactory.net/product/handle-smart-lock/one-grip-open-handle-smart-lock.html A grip open handle smart lock, as long as you gently hold the handle through the fingerprint verification to open the door, is very suitable for bedroom doors. At the same time, the product is equipped with a USB emergency power interface. When the power is exhausted, the door, mobile power can be used for emergency power to open the door.