Expand and unlock the full creative scope of your controller or keyboard with m-audio's universal ex-p expression pedal Manipulate any midi assignable control or parameter in real time, use the ex-p to control any assignable variable midi controller value including volume, modulation, panning, filter sweep and more Built-in and discretely located polarity switch for compatibility with most keyboards, controllers, synthesizers and effect devices with an expression pedal input Secure, robust and hardwired 1/4 inch 18 m TRS cable fits industry standard expression pedal inputs Compact, lightweight footprint and moulded construction provides robust build, portability and performance durability, textured foot-rest for non-slip use and smooth, wide-angled action for precise expressive capability