Found a pic of aReg Snif TDI board need help.

[Newman]

So I've been asking around for info on Reg's threshold mod. Everyone told me the didn't know the circuit he used and finally a guy that goes by SnakeJim on detector prospecter was kind enough to take his TDI that Reg moded and take pics. I was hoping someone could ID that yellow circuit board?

[Carl-NC]

It's custom-made. Jim has sent me that very TDI to look at, I will then write up what all the mods are.

[Newman]

Thanks Carl I was having a hell of a time trying to reverse image search it to find out what it is.