1. Various working modes available (public mode, private mode etc), suit for different application.

2. Low voltage alarm: if voltage is lower than 4.8V, lock will prompt with blue light andcontinuous beeps 8 sounds after opening, during this time period, it can still be unlocked more than 100 times.

3. 4~10 digit passwords with random setting for unlocking.

4. Random order password function and OTP unlocking way keep high safety.

5. Customizing function: PDA data collection, supporting download and print the unlocking record date.

6. Support single/double code unlocking.

7. Two ways for power supply: 4*1.5V AAA battery & 6V DC by Micro USB connector for emergency.