Dapper Bass Mini is a seriosly potent effects strip with all the essentials for bass players. First in line is a stealth fast and accurate tuner so you can play confidently in tune. Boost Comp is a booster and compressor combo. Set-to-forget knobs make it simply diabolical. Bass Amp module will give your bass the life it needs for every musical genre. The EQ is golden with cleans and highly responsive even with the gain up. Plunge into the lush Chorus module to take your sound to a brave new world. Fine tune the onboard rate and depth knobs to beef up your tone. Aux jack is for connecting phone or MP3 player. Plug your headphones into the phones jack for practicing and jamming. This works great with silent guitars. The Phones knob andjust the output volume. The XLR Out feeds a balanced signal to audio interfaces or mixers.