An smooth & durable volume pedal made to work with guitars that have passive pickups (ie not battery powered). This is the 250K (ohm) passive pedal. The pedal has an internal, 2-position micro switch that allows for selecting swell rate. The pedal also features a tuner jack for connection to an external tuner. The tuner signal is constant, not dependent on the volume pedal position. This allows for for silent tuning while keeping the tuner separate from the signal chain - a nice feature! Solid metal construction - made to last and stand-up to gig or studio use. Works well.