Features:     True Bypass, export wav lossless audio       Zinc Alloy shell and compact size, durable and portable      2 Control Knobs: Level, control the loop playback volume, and Tuner, for switching loops.       With 9 Loop effect, 1.wav (loop1) ~ 9. wav (loop9), the longest single track is 10 minutes, and the total time is 40 minutes.      Suitable for Windows System, Mac OS computer import, Export Loops       Colorful LED display, show the recording or playback progress bar, loop number, and tuning status.      With Footswitch, control looper functions, like record, playback, overdub, undo, redo, stop, and delete.    Operating Instructions:    * Recording: Tap footswitch once      * Playback: Tap footswitch once       * Overdub: Tap footswitch once again       * Overdub Recording Playback: Tap footswitch once again       * Undo/Redo: Press and hold footswitch (when recording)      * Stop: Double tap footswitch       * Delete: Press and hold footswitch (when stop)   Specifications:    Material: Zinc Alloy       Power Supply: DC 9V AC adapter (center minus plug)(not included)      Input: 1/4''mono audio jack      Output: 1/4''mono audio jack      Item Size: 90 X 40 X 49.5mm /3.54 * 1.57 * 1.95in      Item Weight: 199g      Package Size: 200 X 70 X 79mm/7.87 * 2.76 * 3.11in      Package Weight: 300g   Package List:     1 * Effect Pedal      1 * Packing Box      1 * User Manual      1 * USB Cable   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.