【Long Lifespan】The smart padlock has low power consumption and long standby function. The locking and unlocking time is unlimited. Full charge can support a standby time of more than onehalf a year and can be unlocked about 3000 times. When unlocked when the battery is low, different display states will be displayed. Can be charged via USB. Robust construction: The padlock latch is made of stainless steel and is therefore particularly tamper-proof. You don't have to worry about the lock being sawed off or broken. Fingerprint Padlock: The smart padlock uses high-tech fingerprint sensor technology and automatic detection function. Your finger is the key. You don't have to worry about loss or theft 【Widely Used】Small and lightweight, easy to use and carry. Smart fingerprint lock, suitable for indoor and outdoor such as luggage, gym, company cabinet, suitcase, bicycle, office,etc. Note: The data are all measured manually, please allow 1-3cm error, due to differences in light and display,