The Super Duper 2 in 1 has 2 of Zvex's infamous but rather delightful Super Hard On pedals in one small box. Also, in this Super Duper 2 in 1 is a master volume control that lets you use it as an overdrive/distortion with any output volume. There is no tone shaping in this pedal. Its two linear high high gain, high Input-Impedance channels wide open is a whopping 3600. The Super Duper gives you a total of four volumes from perfectly clean to ragingly overdriven and your guitar is true-bypassed with both switched off.