Following the success of their Cry Baby Mini Wah is Dunlop's DVP4 Volume (X) Mini Pedal. It's an ultra-compact volume pedal with an aux output that can be used for a tuner or for expression pedal control over effects. When using the Volume (X) Mini as an expression pedal, you can set the minimum control value with an internal pot - very cool. Guitarists at Sweetwater can recommend this to any player that needs volume and expression control in a minimum of space. The Dunlop DVP4 Volume (X) Mini Pedal essentially gives you all of the functionality of Dunlop's DVP3 pedal at half the size.
Dunlop DVP4 Volume (X) Mini Pedal Features at a Glance: