A2212 motor specification:KV: 1000Max Efficiency: 80%Max Efficiency Current: 4-10A (>75%)Current Capacity: 12A/ 60sNo Load Current @ 10V: 0.5ANo. Of Cells: 2-3 Li-PolyMotor Dimensions: ��27.5* 30mmShaft Diameter: ��3.17mmd Current @ 10V: 0.5A30A brushless ESC specification:Output: Continuous 30A， Burst 40A up to 10 Secs.Input Voltage: 2-4 cells lithium battery or 5-12 cells NiCd/NIMh battery.BEC: 2A / 5V (Linear mode)Max Speed: 210，000rpm for 2 Poles BLM， 70，000rpm for 6 poles BLM， 35，000rpm for 12 poles BLM. (BLM: BrushLess Motor)1045 Propellers specification:Diameter of Shaft: 6.0mmAdjustable by hole adapter (3mm， 3.2mm， 4mm， 5mm， 6mm， 6.35mm， 7.95mm)Thickness of center: 9.7mmWeight: 15 gram/ pairRecommended wheelbase: 550mm - 700mmPackage size: 24 * 8 * 2cm / 9.4 * 3.2 * 0.8inPackage weight: 120g / 4.3ozPackage Content: RM5581 * A2212 1000kv brushless motor1 * 30A brushless ESC2 * 1045 propeller with screws