☂【Advanced Fingerprint Gym Lock】The lock locker adopts the advanced fingerprint identification chip ,Quick unlock in 0.5 seconds.It can collect 2 administrators and up to 20 fingerprints total,easy to use. ☂【Sturdy Structure】 - Smart padlock body is made of aluminum alloy, the shackle is made of stainless steel for superior cut resistance to protect your locker room or your home against thieves. ☂【USB Rechargeable】Smart padlock is equipped with lower power consumption and long standby time. A rechargeable 300MAH lithium battery can support 1 year standby time and can be unlocked over 3000 times. When out of battery, the smart lock will remain locked, simply connect the lock to a power supply and it will resume working.