Daphon DF1511A Guitar Stereo Volume Pedal DJ Guitar Effect Pedal Dual Input & Output Features: Vintage Daphon volume pedal for guitar DF1511A. Guitar stereo sound volume pedal. With amplitude adjusted knob to control volume very accurately. Pure sound, guitar stereo band accessory. With  two input jack and output jack, can accommodate two channels of sound.   Specification: Condition: Material: Plastic + Metal Color: Black Connectors: 2 input jack + 2 output jack Package Weight: Approx. 575g/20.3oz   Package List: 1 * Guitar Stereo Volume Pedal 1 * User Manual Note: The product itself does not need to be connected to the power supply, the probability of generating noise is low, if noise and other abnormalities occur after using the product, please first check whether it is a problem with your equipment, such as signal cables, sound amplifiers and so on.