* Stable performance, single,6,11,33 zones 

* MBSU backup battery(4,8,10 hours standby optional) 

* waterproof IP65 

* Automatic sleep, Self-test self-adaptive environment 

* 100 operating frequency optional, strong anti-interference. 

* Updated DSP technology , automatically calibration 

* 7" LCD display 

* Network connecting by USB, WIFI or mobile APP(optional)