... for inner speed 5000RPM motor5. EABS6,Regenerative braking7,3 speeds8,Waterproof0.5kg118*67*38mm6M-3648-1Be suitable for ... ,Learning itself4,Speed limit/unlimited5. EABS6,Regenerative braking7,3 speeds8,Waterproof0.9kg189*82*43mm18M-3648-1Be suitable for ... itself4,Speed limit/unlimited5. EABS6,Regenerative braking7,3 speeds8,Waterproof1kg228*82*43mm step motor controller for motorbicycle/ scooter