efficiency 100% N-FET design. Highest accuracy with Crystal Oscillator (Temperature won't affect the PWM operating range like other cheap ESC's). No low voltage cutoff, because any cutoff in a multirotor = crash. No over temp cutoff, because any cutoff in a multirotor = crash. Super high refresh rate, no buffering of the input signal, resulting in more than 490Hz response rate.16KHz motor frequency, giving fastest response of the motor, and quietest operation as well (no 8KHz squeal). Super simple, foolproof operation! Nothing to program other than the throttle range. Beast for apm 2.8 and pixwhak Specification Cont Current: 30A Burst Current: 35A BEC Model: Linear mode BEC Output: 5V3A Li-ion/Li0poly:2-3S,or Ni-MH/Ni-Cd:4-12NIMH Weight: 25g package include 1x 30A Litining Hobby simonk 30a esc 4s support