U-33B Receiver:Custom designed for use with bass guitar UB-33B transmitterEnhanced headroom for maximum possible clarity and distortion-free audioUnique user-adjustable Bass Boost control for dialing in the exact desired bass punch and presence missing in standard wirelessProprietary companding circuitry for an industry best 120dB dynamic range and clear, natural soundDigiTRU Diversity for optimum range and dropout protectionA-B antenna LED indicators5-LED AF display for monitoring audio levelUn