A 4-position cam on the Pearl P-2002B PowerShifter Eliminator Double Pedal (Right) makes it 4 pedals in one. It also features 3-position PowerShift adjustment, quad beater, low-mass aluminum drive shaft, a uni-pressure spring clamp that allows infinite beater angle, and a floating spring pendulum that reduces waggle. Belt drive. All the great PowerShifter features times 2.