BriefThisis bike motorfor electric bicycle, high performance brushlessdc motor with patent, that is 10% or more efficient than brush motor. Higher efficiency means more real power. More power results in longer run times.Motor Spec.:ModleM12500-2M12500-3Rated Power(W)300/450/600600/750/1000Rated Voltage(V)24/36/4824/36/48Speed Range(rpm)2000-35002000-3500Effeciency(%)>80>80Noise(dB)<65<65Weight(kg)1.62.5Usagee-bike,e-scooter,textile machinery andmedical equipment etce-bike,e-scooter,textile machinery andmedical equipment etc Features(1). High efficiency (2). Smaller size with higher power (3). Cordless means convenience (4). Low noise (5). Green products, Environmental protection. (6). Long life, Free maintenance The outline of this product: (If you download this picture, it will be clear.) The performance curve of this product: (If you download this picture, it will be clear.) The performance data of this product: (If you download this picture, it will be clear.) MAC offers the best price-to-performance valuable products in the market.If you have any problem, please feel free to contact us.Thanks !