Stax Looper PedalSuper mini size, made of aluminum alloy, convenient and durable. With record(up to 10mins), overdub(unlimited), undo, redo and delete functions. Simple operation, one key to achieve almost all of functions. With one knob for adjusting the output volume. Comes with a USB cable for uploading and downloading audio file from PC. SpecificationsWorking Current:96mA on/off LED indicate effect or bybass LEVEL Knob adjust the the play output volume INPUT Jack:1/4 mono audio jack, for connecting Guitar OUTPUT Jack:1/4 mono audio jack, outputs the signal DC In Power Jack DC 9V (negative in the center) True Bypass Footswitch Push down the footswitch to toggle between on and bypass status How to import the files to PC?Please download the program from our offical website. Keep the looper connect with 9V power supply. Keep looper in SAVE MODE(Green LED on.NO Blinking status) Connect USB with looper and PC to upload or download NOTE: Only WAV audio file can be uploaded to the looper from the computer. Please note this pedal can NOT powered by batteries. Need a DC 9V power supply with negative in the center to power up, you can buy one at Stax Music Store. Packing list1 * Looper Pedal 1 * USB Cable 1 * User Manual 1 * Packing Box