Rowin TWIN LOOPER is the perfect blend of quality,creativity and simplicity, can mtach your instrument to make a subtle performance or a jaw dropping show. Looper Guitar Pedal allows you to play loops in reverse, you can reverse loops or slow them down to fast, half-speed or both at the same time.Stereo input and output, and left and right channels volume individually adjustable .Hi-Fi sound/ no noise.10 minutes of looping time, unlimited overdubs and undo/redo function. Specifications: Input Impedance:Two 1/4 Jacks (Impedance: 470k Ohms), Output Impedance: Two 1/4 Jacks (Impedance: 100 Ohms),Power Supply: DC 9V (Plug polarity is Positive on the barrel and negative in the center), Sampling Rate: 44.1K, Sampling Accuracy: 24Bite, Working Current: 165mA Package includes 1 x Twin Looper Pedal, 1 x 9V power supply, 1 x User manual