1.30A ESC for Multirotor.Highest accuracy with Crystal Oscillator (temperature does not affect the PWM operation area as other cheap WSA). 2.No undervoltage lockout,This hardware, with the Simonk firmware, gives you the perfect solution for multi-rotor use. 3.Highest Efficiency 100% N-FET design.Highest accuracy with Crystal Oscillator (temperature does not affect the PWM operation area as other cheap WSA). 4.No undervoltage lockout, because everyone in a cutoff Multirotor = crash. No overtemperature shutdown, because any shutdown in a Multirotor = crash. Super high refresh rate, no buffering of the input signal, resulting in more than 490 Hz response rate. 16KHz motor frequency, thereby fastest response of the engine, and silent operation as well (no squeaks 8KHz). Super easy, simple operation Nothing to program other than the throttle region Max cont. Current: 30A peak current: 40A (10s) Voltage: 2-3S LiPo, BEC: 5V / 3A Type : 22 x 12mm KV: 920rpm/V Voltage: DC 7-12V Material:plastic colour:black Package Contents: 2 * CCW Brushless Motor 2 * CW Brushless Motor 4 * 30A ESC 4 * propeller Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.