Maxon "OD-9 Pro +" Overdrive pedal. What do you think? Functionality confirmed. Immediate purchase available. Used item, sold as-is, no returns. Body only. - Knobs: Drive, Tone, Level, Boost/Normal switch, Voltage boost mini-switch (9/18V) - see photo 3 - Input/Output jacks: Input, Output - Power: 9V battery or AC adapter - Made in Japan From the manufacturer's website: "Newly equipped with a BOOST/NORMAL switch. In NORMAL mode, the thick, natural overdrive sound unique to the OD9 has been further enhanced. In BOOST mode, the high and low frequencies are cut, boosting the mid-range, resulting in a smooth, clear tube sound without a thin feel. A DC-DC converter is installed in the power supply, boosting the operating voltage to 18V (±9V). An internal voltage switch allows for use at 9V (±4.5V). Equipped with a True Bypass Switch using a 4PDT mechanical switch." "The Overdrive OD9Pro+ inherits the concept and basic functions of its predecessor, the OD9, while improving performance." "The Overdrive OD9Pro+ is equipped with a DC-DC converter circuit in the power supply, boosting the operating voltage to 18V (±9V). It is capable of producing a powerful sound that surpasses the previous OD9 model." #Overdrive #OD-9 #OD9PRO+