Feature: 1. No need for keys, no longer worry about traditional keys. The smart lock allows fingerprint keyless entry-0.5 seconds to quickly unlock. Access important content quickly and easily. 2. The compact device is best for people who want to secure a backpack or gym locker. The locker's biometric lock weighs only 3.5 ounces. 3. 6 months of battery life per charge (or 3500 unlocks). In case it runs out, charging for 8 seconds with any portable battery pack will wake up the fingerprint padlock. 4. The lock body is made of alloy material, and its shackle is made of stainless steel to achieve high hardness and high compressive strength. 5. Support 20 sets of fingerprints. Specification: Material: zinc alloy Fingerprint sensor: semiconductor fingerprint sensor technology, record 5 times and store 20 groups The shape of the fingerprint head is square: 10.4*10.4mm Technology: Biometrics False acceptance rate: <0.001% Rejection rate: <2% Fingerprint collection time: ≤0.5 seconds Fingerprint matching time: ≤1.0 seconds Administrator fingerprint capacity: 2 sets of fingerprints Fingerprint setting: short press to unlock, long press 3S to set fingerprint, long press 6S to delete fingerprint Lock core: no mechanical lock core Battery: Lithium battery 60mAh 3.7V Charging current: 5V/100ma Full: prompt red light off Low battery alarm: 3.3V LED light: three-color light USB interface: Micro USB 5V 0.5A (emergency + charging) Package List: 1*Fingerprint lock 1*Data cable 1*Instructions (on the product packaging)