trdhrdr007
Bronze Member
- Nov 1, 2009
- 1,427
- 1,332
I found this in a warehouse full of stuff I bought a while ago & it's been sitting in my workshop ever since. When you turn the knob it makes a humming/buzzing tone. Turning the knob further the tone sounds exactly the same & doesn't change volume until it gets about 3/4 of the way around when it cuts out. It runs on a 9 volt battery that fits in the handle. I can't find any marks on it.