I'm selling this cause I never use it--I hardly ever play in a place where I can even go more than ten feet away from my amp. It's the bass version with extended frequency response. It's in great shape with the transmitter, receiver, and the AC adaptor. The receiver can be run with a 9v or the AC. I had to purchase the AC separately from Samson for $17--it's included here along with the box and manual. Shipping to the lower 48 is also included.