I bought this unit and use it all day as an AV technician. The POE test, continuity function, and cable length are all worth their price, but the toner function, or "scanning" when using alligator clips, is rubbish. The tint/scan function works well when working with just ethernet cabling because it can use all 4 pairs, but using alligator clips from RJ11 to 8 pin just doesn't get the connection right. I couldn't identify any wires using this method. As I said, Ethernet works well, but theβ¦