Electro Harmonix Hot Tubes Nano Overdrive, With the price of vintage HOT TUBES soaring, countless guitarists have requested that we re-issue our 1970s CMOS HOT TUBES. We’ve done this using the exact same design and miniaturized it, too! Volume and Overdrive let you go from a gentle rasp that caresses your notes to a full-blown gain monster with a powerhouse punch. Sculpt your sound with the Tone control, or take a detour around the tone circuit with the Tone On/Off switch. True bypass for a pristine signal chain.Βattery operation possible (battery included), 9V DC-200 power supply is required (not included).