Main parameters:
1) Size: 71 x 50 x 13mm.
2) Case: ABS.
3) Output port: 2 ports of RJ11.
4) Alarm volume: ≥95DB.
5) Standby time of built-in rechargeable lithium battery: 7 days.
6) Code modification function: yes.
7) Low battery indication: yes.
8) External power on / off indication: yes.
9) Power input port: USB.

Optional accessories:
1) Power adapter: 5V/4A.
2) AS3X series IR remote keys.