Uses the highest quality parts available with a discrete FET design and low impedance output, the booster provides up to +20dB of unadulterated boost with multi-dimensional, shimmering highs and lows, and no ear fatigue. The internal DIP switches let you choose the boost frequencies, and EQ settings. Features: Uses the highest quality parts available with a discrete FET design and low impedance output. Provides up to +20dB of pure boost, and let the tone have a more stereoscopic flare of high and low frequency, and do not produce auditory fatigue. Internal DIP switches allows you to select the boost frequency and equalization settings. Use true mechanical True Bypass switching. 3.5"*1.5"*1.2" mini size with blue indicator and transparent rotary knob. Suitable for guitar, bass and other electroacoustic musical instrument. Specifications: Material: Metal Input Impedance: 1M ohm Output Impedance: 1k ohm Power Consumption: 9VDC or 18V Item Size: 93 * 38 * 32mm / 3.66 * 1.50 * 1.26in Item Weight: 123g / 4.34oz Package Weight: 160g / 5.66oz Package Size: 11.5 * 6.2 * 6.1cm / 4.53 * 2.44 * 2.40in Packing List: 1 * Effect Pedal