Based on TS9 Tube Screamer.Tube Screamer Overdrive Production type ：HAND-MADE Effect Type : Tube Overdrive. IC: JRC4558D. High quality capacitor type:CBB,Ceramics ,Tantalum capacitors etc. Tone control Drive(Overdrive)control Level control True bypass switch 100% analog signal path On/Off LED indicator Dimensions (L/W/H): 94(L)MM x 39(W)MM x 32(H)MM Power: 9VDC100mA, Negative Tips (Regulated recommended) Weight: 165g