Specifications:
1. Material: zinc alloy
2. Working voltage: 3.0-4.2V
3. Lock weight and Size: 3oz, 3"x 2"x 0.5"
4. Fingerprint sensor coverage: 72 x 64mm
5. Unlock speed: within 1 second
6. Working period: a year per power Charge
7. LED light: three color light: red / blue / green
8. Battery: 3.7V lithium build in battery
9. Working temperature: 14F to 104F
10. Fingerprint capacity: record 10 times and save 10 groups