It mounts on the tailpiece in the G-string hole.
I have modified the microphone slightly with a windjammer to block out breathing noise.
It comes with battery box.
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On my Hengsheng violin, which has a tailpiece with built in fine-tuners, I mounted the microphone with the help of a metal washer between the A and D strings.
Here is a recording of the SD LCM110 through my AER alpha plus amp. There was no need to fine tune the response with the eq. There is no added reverb:
Here is a snapshot of the settings on the AER:
A small sample of the SD-systems going directly to disc without eq or effects: