Description: The smart doorknob can be adjusted and installed on the left and right doors. It can enter 50 fingerprints, and you can invite relatives, friends, tenants, etc. to enter fingerprints. When the battery is low, it will flash a red light to remind you. It comes with USB emergency charging in case of an emergency. Features: [4 Opening Modes]The smart door lock can be unlocked with 50 sets of fingerprints, unlocked with keys or passwords, or set to normally open mode (usually used indoors). [Fingerprint Design]Fingerprint door lock can unlock your door within 1s. It can accurately identify fingerprints and is safe and reliable. [Easy to Install]Can be installed on both right-handed and left-handed doors, with No wiring and no punching. [Durable]All metal chassis for strength and durability, strengthened springs ensure that the lever stays level over time. [Modern Style]The door lever lockset offers a clean and sleek look that will blend into any door. These door handles complement other door furniture and adds a modern touch to your home or workplace. Specifications: Color: Silver; Black (Optional) Material: Zinc Alloy, Copper (Lock Cylinder) Style: Practical Lock margin: 60-70mm / 2.36-2.75inch Applicable door thickness: 35-55mm / 1.37-2.16inch Fingerprint capacity: 50 Groups Open left and right: Yes Battery: 4*AAA batteries (Not Included) Occasion: Bedroom, Bathroom, Kitchen, etc Package Size: 25.5*18*8cm / 10.03*7.08*3.14inch Package Weight: 930g / 2.05lb Package List: 1 * Door Levers Lockset 1 * 2PCS Keys 1 * User Guide 1 * Install Parts