Product Name: Ibanez TS9 Tube Screamer Controls: Drive (Amount of Distortion) - Tone (Timbre / Treble) - Level (Output Volume) Power: 9 V DC (Center Negative) or one 9 V battery (Current Consumption 8 mA) Input Impedance: Approximately 500 kΩ Output Impedance: Approximately 10 kΩ Size/Weight: Approximately 124 x 74 x 53 mm / Approximately 550-570 g Main Features: An overdrive pedal that emphasizes the midrange, a classic pedal praised for its "warm distortion like a tube amp." Circuit: Soft clipping method using an op-amp (such as JRC4558D) + silicon diodes. Series: A representative model of the early 1980s "9 series," following the lineage of the Maxon OD-808. Thank you for viewing. I have used it a few times, but it is still in beautiful condition. I used it with the protective vinyl still attached. Thank you.