Roland EV-5 Expression Pedal

This is what Roland say about the EV-5 Expression Pedal:.

The EV-5 Expression Pedal is designed for use with keyboards or other Expression-compatible instruments and devices, providing a more dynamic performance. You can set the minimum volume to the level of your choice, thereby determining the maximum effect of the pedal.

• Cable Length: 2 m (TRS 1/4" Plug)
• Controls: Main Volume Pedal, Minimum Volume Knob
• Size: 86 (W) x 200 (D) x 54 (H) mm
• Weight: 400 g

• Continuous controller for synths and keyboards