Please read my profile before purchasing for a smooth transaction. This is a state-of-the-art fingerprint lock where your finger becomes the "key." You don't need to carry a key, and there's no need to remember a PIN. Just place your finger on the sensor, and it unlocks quickly in less than a second. The body is made of robust zinc alloy and is compact yet highly secure. It uses USB charging and can last for several months to up to a year on a single full charge. It also has a function to notify you with an LED when the battery is low. 【Product Condition】 I am selling this due to organizing my home. The exterior has no noticeable scratches or stains and is in very clean condition. The sensor and hook are also clean and ready to use. A USB charging cable is included as an accessory. *Instructions are not included, but setup is possible with simple operations such as "long press the sensor to start registration." 【Recommended Points】 Perfect for those who find it cumbersome to carry keys for gym lockers or are worried about their children losing keys. Many models can register 10-20 fingerprints, making it convenient to register the fingerprints of the whole family and use it for shared gates or warehouses. Experience a smart life free from the stress of losing keys.