Mono volume pedal, perfect for use with passive instruments with a single, mono input/output. A separate tuner out is included, allowing you to mute the instrument output, while still sending signal to your tuner. A micro-taper switch behind the jack area, under the footplate, gives you two distinct volume swell rates, and the standard 250kΩ potentiometer works great with passive instruments. Features centerless, ground 1/2" diameter stainless steel main pivot shaft , tough long lasting Kevlar cable, stainless steel springs. Dimensions: 3.5" W x 10" L x2 3/8" H (89 x 254 x 60mm).