1. There are four locking methods: fingerprint unlocking, password unlocking, Tuya Bluetooth APP unlocking, mechanical key unlocking 2. Power supply: 4 x AA alkaline batteries (not included) 3. Lock body material: aluminum alloy 4. Indoor lock with 60/70 single tongue lock body 5. You can easily replace old locks without additional holes 6. Fingerprint storage capacity: 100 pieces 7. Suitable for door thickness: about 35-55mm 8. Hole size: about 45-60mm 9. Weight: about 1570 grams 10. Size: about 15.5x6.8x2.75 cm
