I bought this kit on here a few years back and can't find much info on it. It is a DIY assembly kit for Peak PEP power readings on your Bird watt meter.

I never ended up using it because the meter that i purchased had one pre-installed.

This one comes with all the parts and color printed instructions on how to assemble and calibrate.

It has never been opened or assembled so I have no idea if it works. Sold As is. No Returns.