Have 2 CPSs an old tif, a D Tek Select that was good until it had a switch problem, shipped it off for repairs, got it back and it's worthless. Called my supply house and whined. They sent me an Informant II. Best detector I've had since the Spy 5 back in the 70s. Had a hand me down H-10 way back, and as I recall, it was a good detector. Just had to have a dropcord for it. Oh yeah the II also is a great Combustible gas detector too. I'm usually not impressed by tools that have multple functions, but this one seems to be a winner.