Featuring a ratio parameter knob for more dynamic limiter control, controllable threshold and an enhance that adds body and presence to your signal with the twist of a knob, the Boss LMB-3 Bass Limiter Enhancer is like a instant makeover for your sound. Compact but full of features that will complement the natural tone of a bass and play well with other effects, the LMB-3 gives you that perfect, compressed, punchy tone without punching a hole in your wallet. - Does Not Include Power Supply