1、[WITH 3 KNOBS] The effect pedal has 3 adjustment knobs of Distortion, Filter and Volume, which can get a variety of effects. 2、[EASY ADJUSTMENT] You can choose STOCK or MOSFET limiter circuit, and FAT key can choose beautiful coarse color. 3、[CHIPS SWITCH] Allow users to easily switch between stock for OP07DP and other popular chips, with good performance. 4、[FIRM STRUCTURE] Using metal shell and high quality accurate parts, with firm structure and long service life. 5、[POWER SUPPLY] Can be powered by 9V 6F22 battery (not included) or DC 9V power adapter (not included), suitable for various situations. Item Type: Distortion Effect Color: Gray Material: Metal Input Impedance: 1/4in Mono Audio Port (Impedance: 1MΩ) Output Impedance: 1/4in Mono Audio Port (Impedance: 100Ω) Working Current: 20mA Power Supply Mode: 1 x 9V battery 6F22 (not included), or DC 9V power adapter, internal negative external positive (not included) 1 x Effect 1 x User Manual Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store