LHI 4x 2212 920KV Brushless Motor (CW / CCW) + 4x SIMONK 30A ESC For DJI Phantom 1. For F330 X525 450 500 550 DJI Phantom Quadcopter Multirotor. 2. New type of impeller seat, more stable performance, more convenient dis-assembly. 3. NMB Bearing and HRC55 degrees stainless steel Axis design, to support up to 15000 spin speed. 4. Efficiency N-FET design, highest accuracy with crystal oscillator (temperature will not affect the PWM operating range like other cheap ESCs'). 5. No low voltage cutoff, no over temp cutoff, because any cutoff in a multipotor = crash. Positive and negative teeth self-locking, good balance. Powerful and easy to assemble. Turn smooth, no noise. With rigorous testing, youcan take it easy to use. 2212 920KV Brushless Motor Outer diameter: 28.0 mm Height: 24.0 mm (Without Shaft) KV: 920kv Fit for DJI Phantom F330 F450 F550 X525 Rotation direction: Left hand tread Not Original DJI Phantom Product 2x 2212 920kvbrushless motorCW(NO Color Box. Packed Safely in Bubble Bag.) 2x 2212 920kvbrushless motorCCW(NO Color Box. Packed Safely in Bubble Bag.) 4x 30AMP 30A SimonK firmware Brushless ESC