Independent Development. Our Design .Flexible Program Solution Spec Variety: DC36V,1000W DC48V,1200W DC60V,1500WTechnical parameter :Voltage: DC36V, DC48V,DC60VUnder-voltage protection: DC32V, DC42V, DC52VCurrent limit :≥35ASpeed adjustable range: from"0"to "100" percentEfficiency:≥83 percentController wire E-bike brushless Controller 60V 1500W