Specifications: KV: 930 Max. efficiency: 80% Max. efficiency current: 4-10A (>75%) Current capacity: 12A/60s No Load current @ 10V: 0.5A No. of cells: 2-3 Li-Poly Motor size: 27.5 * 30mm / 1.1 * 1.2in Shaft diameter: 3.17mm / 0.1in Item total weight: 256g / 9.0oz Package List: 4 * A2212-930KV BL Motors 4 * Sets of Accessories