I've used this about four times live. There's almost no change in sound, although it feels like the bass is slightly reduced, but there are also times when it sounds clearer. Above all, the lack of delay is fantastic, and I could move around freely during the live performances without any stress. BOSS wireless system, WL-20. Battery-powered and compatible with 1/4-inch jack connections. - Brand: BOSS - Model: WL-20 - Function: Wireless system - Power: Battery-powered - Connection terminals: 1/4-inch jack - Color: Black Thank you for viewing.