Features: 4-in-1 guitar effects pedal, distortion + overdrive + loop + delay. Distortion: a high gain distortion sound2 modes to choose, with Gain, Tone, Pres and Vol control knobs. Gain--Adjusts the amount of distortion; Pres--Adjusts the high frequency; Vol--Adjusts the output level; Tone--Adjusts the EQ. Clockwise is brighter, counter clockwise is darker. Overdrive: Based on tube overdrive(ts9), with Drive, Tone and Level control knobs. Drive--Adjusts the amount of overdrive; Tone--Adjust the amount of treble in the sound; Level--Adjusts the output volume. FX Loop: The SEND and RETURN jacks allows you to expand your board with other pedals. The FX LOOP point is between the overdrive and delay modules. Delay: with Repeat, Delay and Level control knobs, 25ms-600ms adjustable delay time. Level-- Sets the level of delayed signal mixed with guitar tone, there is only guitar signal when fully CCW, and loudest delay when fully CW; Delay-- Adjusts the delay time from 25ms(fully CCW) to 600ms(fully CW); Repeat-- Adjusts the repeats of the delay signal, one repeat(fully CWW) and infinite feedback(fully CW) Specifications: Material: Metal Power Supply: DC 9V power adapter (not included) Item Size: 19 * 12 * 3.5cm / 7.5 * 4.7 * 1.4in Item Weight: 665g / 1.5lb Package Size: 22.5 * 12 * 6cm / 8.9 * 4.7 * 2.4in Package Weight: 740g / 1.6lb Note: Power adapter is not included. Please use the power adapter whose polarity is positive pole outside and negative pole inside. Otherwise, the product may not work properly. Package List: 1 * Effect Pedal