Rockboard MOD 4 & U2 Transmitter

I'd say it works relatively good if you dont move at all, but if you have pedals(wah for example) that you will use while playing or even if you want to move while playing then this wireless system is not made for you. If there is no clear line of sight between transmitter and receiver, signal will struggle a lot to go through and you'll hear it. In short, buy it ONLY if you don't plan on moving in any way while playing.