Features:Dual channel modulation pedal, supporting stereo input and output.Both of the two effects have independent SPEED/RATE, CONTROL, and DEPTH/MIX knobs.In the middle of the panel, a 3-position toggle switch is used for choosing the sequences of the two effects’output.Each channel features 9 effects, you can adjust various tones with the independent Tap Tempo control.True bypass design minimizes tone loss. Specifications:Brand: JOYOInput: 1/4” mono audio interface x2( impedance )Output: 1/4” mono audio interface x2( impedance100 Ohms)Sample rate: 44.1KSampling accuracy: 24bitCurrent: 170mAPower Supply: DC 9V AC adapter (center minus,Not included)Package size: 18 * 10* 7cm / 7.1 * 3.9 * 2.8inPackage weight: 550g / 17.6 oz Note:1.Power adapter is not included.2.Please use the 9V power adapter whose polarity is positive pole outside and negative pole inside. Otherwise, the product may not work properly.3.As the pedal is freequantly used to being toed down, in order to avoid misoperation, we designed it like that you need put a little bit more pressure to activate the on switch, it is not a defect, but we need to do like that. Package Includes:1 * Guitar Effect Pedal1 * User Manual(English)