The GTX-7 Footswitch was developed for use with Mustang GTX amplifiers, allowing users to select various presets and effects from the floor. Looper buttons access the amp's Record, Play, Overdub, Stop and Undo functions, Tap Tempo is accessible for time-based effects, and the chromatic tuner is also selectable on demand. Removable cable with 1/4 inch. plugs included. The following ampliers can also utilize the GTX-7 Footswitch after a firmware updgrade: Mustang GT40, GT100, GT 200 and Rumble Studio 40 and Stage 800.