This is a barely, rarely used item. Mint condition. Includes power supply, user guide and original box. Only used 2 or 3 times. Description from Radial website: Combination PZ booster and preamp Two inputs: two instruments or blend/mix Parametric EQ and notch filter Suggested retail: $400 USD Four outputs: amp, tuner and two DI outs Works with any instrument! For sale only. Paypal or Money Order. Shipping to USA only. $245 shipped.