Dimension: 55(Dia)xH33 mm Weight:81g / 0.63 oz Motor housing diameter: φ2.0cm Motor adaptor diameter: φ2 mm Recommended Motor type: 2409H-7T / B20 in-runner brushless motor ( not included ) KV: 5300 Blades diameter:φ53.5 Working Voltage: 3-4 cells lipo Current: 40A Max. current: 45A/60S Thrust: 720g @ 13.5V Temperaturer: 67℃ @ 10 minutes Power: 540 Watts