Detailed Product Description Common brushless Dc motor controller specifications: 1) Current:≤40A 2) Voltage : 24V,36V,48V,60V3) Power : 250W,350W,450W,500W,600W,800W,1200W4) Working voltage : DC21V~30V,DC31~45V, DC41V~62V.DC51V~72V5) Working efficiency : ≥81%( it all depends on your motor )6) Rated power : ≤ 1200W The above functions of Our products is option