Feature: 1. The motor is light and only weight 5 grams each which will not add too much weight to your drone. 2. The motor,which has strong power output,will enhance your drone's mobility. 3. Integrated with heat dissipation hole for better heat dissipation. 4. The motor can be powered by 3~5V voltage for different rotation speed. 5. The motor has a 12cm tail circuit,and the motor output shank is 5mm long. Specification: Item Type:Motor Motor Diameter:8.5mm / 0.33in Motor Length:20mm / 0.79in Output Shank:1mm / 0.04in Output Shank Length:5mm / 0.2in Tail Circuit:12cm / 4.72in Weight: 5 g / 0.18 oz(approx.) Voltage:3~5V Current:0.15A Rotation Speed: 3V:35000-37000 RPM 5V:50000RPM (Approx.) Package List: 2 x Motor