Details
Jackson Audio Prism EQ and Boost Guitar Effects Pedal, Stainless Steel (PRISMSV)

Tone Control - An extremely powerful active EQ, the TONE control adjusts the high frequencies by giving a +/-15dB boost/cut to those frequencies
Pre Gain Switch - Selects between 3 varying levels of gain for each boost circuit: High -Voiced for heavy breakup/lead tones; Med - Voiced for mild breakup/rhythm tones; Low - Voiced for maximum clean headroom
Body Control - An extremely powerful active EQ, the BODY control adjusts the low frequencies by giving a +/-15dB boost/cut to those frequencies
Boost Control - sets the overall level of boost available from the PRISM. Think of the BOOST control as a master volume that works in tandem with the PRE GAIN switch to dial in the ratio of gain to boost level
Circuit Select - Selects between the 3 boosts circuits: COLOR - Vintage Silicon Treble Booster Style boost. Perfect for Brian May (Queen) style rhythm and lead tones! ; AMP - A very musical sounding MOSFET boost that emulates the tonal response of an overdriven vacuum tube amp! ; TRANS - An ultra transparent 18V powered JFET boost circuit. Sounds like you only LOUDER!