1) 4 digital code lock
2) Sensitive
3) Low consumption, Power: 6F22 9V battery x 1 (Battery not included)
4) Adopt quiver-alarm technic, safety and credibility.
5) Fixing convenience and easy to use.
6) Dynamic current: <100mA
7) At least 100dB alarm
8) Environment humidity level: 5%~98%