BM-800 / BM-700 HAM Radio Preamp Modification

Description

Hello and thank you for looking!
This auction is for one assembled preamp board. Some electronics is required as we cannot cover all configurations in the instructions. If you have any questions feel free to send us a message before bidding.
PREAMP ONLY. MICROPHONE NOT INCLUDED.
This preamp is designed to be used on the BM-800 and BM-700 microphones. The preamp replaces the existing one and  makes a more useful interface to your HAM radio or CB equipment. Buyer will need to make their own cable to connect the microphone to their radio.
The preamp features adjustable bass and treble controls.
Can be powered from +5 VDC to +15 VDC.
Disclaimer: If you do not know how to properly install this board into your microphone we suggest you bring it to a qualified radio technician as we are not liable for improper installation.
Thanks for looking!
Here is a video that shows the performance of the preamp https://www.youtube.com/watch?v=CIi1PC9yxn0&feature=youtu.be