The BackBeat G1 is a wearable subwoofer that you attach to your bass strap or belt. It has a transducer that shakes on a spring when you have your bass plugged into the unit that allows you to feel the low end. It has a 1/8" TRS aux input that allows you to run your music into the unit as well as a 1/8" TRS headphone out so you can hear it as well. The 1/4" in and out is where you run your bass in and then out to your amplifier or D.I.

This item is in good condition with scratches to the paint along the rumble unit.