DescriptionApplies to all keyboards， synthesizers， MIDI keyboards;Realize reversing via the polarity switch， no need to worry about the non-universality of different brands;Non-slip lower parts， polarity switchSuitable for:Almost all keyboards and electric pianos on the marketModel: WTB-005Adjustment: positive and negative polarity switchMaterial: MetalColor: Silver tone + BlackSize: 23 x 7.5 x 6 cmSilver plate: 11 x 4 cmCable Length: 1.5mPackage included1 x Sustain Pedal