Specifications:KV: 930Max. efficiency: 80%Max. efficiency current: 4-10A (>75%)Current capacity: 12A/60sNo Load current @ 10V: 0.5ANo. of cells: 2-3 Li-PolyMotor size: 27.5 * 30mm / 1.1 * 1.2inShaft diameter: 3.17mm / 0.1inItem total weight: 256g / 9.0ozPackage List:4 * A2212-930KV BL Motors4 * Sets of Accessories