Tech 21 SH1, Preamp for Electric Bass, Steve Harris (Iron Maiden) signature pedal, 2 Channel modes with independent gain and volume controls, Completely analogue SansAmp technology, Active 4-Band EQ, ±18 dB boost or cut, Integrated chromatic tuner, Integrated speaker simulation, Controls: 2x Volume, Blend, High, Low, Mid 2, Mid 1 Comp, 2x Gain, Switch: XLR, Speaker Simulation, Bite (Boost), Foot switch: Channel 1/2, on and tuner, XLR DI output, Input: 6.3 mm jack with 4.7 MOhm, Output: 6.3 mm jack with low impedance, Sturdy metal housing, metal switch and socket, Dimensions (L x W x H): 19.7 x 6.3 x 3.2 cm, Includes 9 V DC universal power adapter #DC9 with automatic switchover to 100 V / 240 V, 200 mA