1、Fingerprint Unlock: You can add 2 admin users and up to 20 fingerprints to unlock the lock. Please note: The 1st 2nd fingerprint you add is the admin fingerprint, the 3rd to 10th are the guest fingerprints, only the admin user can delete the fingerprints. 2、Prevent Theft: Fingerprint padlock has no app, no key, no bluetooth. Friendly to children and the elderly, your finger is the key to stop the thief from cracking the code, no worries about losing the key or the thief knowing the code. 3、Ultra Light and Portable: This smart keyless fingerprint padlock is only 22g, lightweight and portable. You can use this lock in the following scenarios, such as gym, school, travel and fence, etc. 4、Sturdy and Waterproof: This smart keyless biometric fingerprint padlock is made of all zinc alloy one piece stamping, high hardness, strong and durable, IP66 waterproof and dustproof. 5、Wide Range of Ues: This smart waterproof fingerprint padlock is suitable for indoor and outdoor smart fingerprint locks, such as luggage, boxes, bags, backpacks, doors, bikes, lockers, suitcases, drawers, etc.