HQRP Foot Switch for Alesis SR-16 SR-18 Drum Machine Damper Sustain Pedal + HQRP Coaster HQRP&reg; Footswitch Damper Pedal plus HQRP&reg; Coaster; Connector: 1/4 inch; The pedal is made in foot switch style; For all electronic keyboards, synthesizers, tone modules or drum machines with 1/4" phone jack sustain-pedal input; 200 days warranty!