Selling to organize my equipment. This is a one-knob preamp booster. As you turn up the knob, it gives a sparkly, noticeable impression. It's better to use it in conjunction with another preamp, either before or after it in the signal chain. The footswitch is light, and the LED is quite bright when viewed from directly above. For your reference. All accessories are included. #guitar #preamp #booster #EQD #effector