Morley TMS - T.M. Stevens Fonk Wah Pedal is switchless and has two wah modes - Traditional and Fonk Wah; both voiced for bass guitar frequencies. Traditional Wah mode gives you vintage wah tone. Click on the Fonk Wah switch and you get a lively, percussive funk-wah sound that is great for slappin' and poppin'. The pedal comes with a trim knob and an LED for adjusting input level for active or passive pickups. Additional features include wah level control, LED indication, easy-access battery compartment.