I bought a couple of these 5.8Ghz wireless links after some drop outs on a 2.4Ghz device. As expected, a good solid connection, with automatic syncing of each channel (4 available) I found the rather longer size no more awkward, infact they 'twiddle round' less. The white receiver is easily recognised on dark stages, but power and channels buttons are difficult to distinguish. I'm guessing the input impedance is at least 1M. Ohms - suitable for passive piezo pickups. Output seems slightly higher than input? So far, I've not noticed any "birdie" sounds when plugged into electrically "noisy" digital equipment - a problem with some 2.4Ghz stuff. I really like the inclusion of a carry case! I would recommend buying a couple of these, before the price goes up!😄