Specification  Voltage: DC 3.7V Motor diameter: 7mm Motor Length: 20mm Output shaft: 1.0mm Output shaft length: 6.3mm Line length: 115MM Voltage: 3.7V Current: 0.1A (blocking current 3.7A) Speed: 48000RPM  Features: 720 Coreless motor is High Speed and Low Torque motor Less noisy operation, Offers low resistance. This 720 Magnetic Micro Coreless Motor is very compact and lightweight DC motor nicely crafted for perfectly matching with your small 100mm like multirotor frames. They are rated at 48000 RPM which is more than needed to lift and push your drone to the target. These are less noisy with low resistance.