Smart Wireless Door Lock- You can replace your existing knobs with Smart locks.

• Access by PIN. APP, fingerprint, and Mechanical key.
• Zinc alloy case
• With Tuya Bluetooth, 100 mobile users -255 users (100 fingerprint + 155 PIN)
• PIN length: 4~6 digits
• With a USB port for emergency power
• With a Backup mechanical key for emergency override
• Require 4 x AAA battery