Features: 1. Padlock without Charging: 2-way communication technology, reverse power supply for cell phones to open the lock. After opening the lock to keep 2-3 seconds after leaving, to ensure that the power supply is sufficient to avoid insufficient power supply to close the lock, you can point off the lock function. 2. Remote Authorization to Open The Lock: When a friend needs to open the lock, you can also authorize the lock in a distant place, add APP friends, authorize the lock or remove permissions at any time and anywhere. 3. Lean on A Lock: Switch the lock more simple, support NFC bracelet unlocking, cell phones open every open APP, authorize the bracelet to lean on a lock. 4. Unlock Positioning Display: Unlock positioning at any time to query, unlock positioning for cell phones, you can see the unlocking time, unlocking person, unlocking time. Time, unlocking person, unlocking location. 5.After-sale Service: If you have any questions, please contact us immediately and we will help you solve it as soon as possible. Specifications: Material: ABS+PC Material of unloading buckle: SUS 304 Support models: support NFC function of cell phones Power model: cell phone NFC reverse power supply Waterproof: IP55 Android: 9.0 Protection level: IP22 Unlock mode: AP, NFC Size: 72*40*18MM Occasions:Can be used for personal luggage, dormitory lockers, factories sites, hotels office, indoor door, gym,etc. includes: 1 * Lock 1 * Manual About Shipping: All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.Any questions, please feel free to contact us During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shopping Thanks for your cooperation and we'll make you feel satisfied.