Simonk 10A/20A/30A ESC Electronic Firmware Speed ControllerWeight (SimonK): before you buy these, you should familiarize yourself with the somewhat experimental nature of the SimonK firmware. This software pushes the motor response to the limit, so there may be combinations of motors and props that won't work. Simonk 10A: This is the best 10A ESC for multirotorThis hardware, with SimonK firmware, provides the perfect solution for multi-rotor useSuperior performance 100% N-FET design. Highest accuracy with crystal oscillator (temperature will not affect PWM working range like other cheap ESC). No low voltage cut-off, because any cut-off in the multirotor = failure. No excessive temperature cut-off, because any cut-off in the multirotor = failure. Very high refresh rates, no buffering of the input signal, resulting in more than 490Hz response rate. 16KHz motor frequency, providing the fastest motor response and quietest operation (no 8KHz squeal). Super-simple, reliable performance! Nothing to program beyond throttle range. Max cont.current: 10A Peak Current: 20A (10s)Voltage: 2-3S lixx,BEC: 5V/3ARome: 38*15.5*6Net Weight: 9gPackage Weight: 19gSimonk 20A:Simonk 20A (2-3S):P Fixed Line: 20APrect Line: 28AMbec Model: Line ModeBEC Output: 5V3ALi-ion/li-poly: 2-3S or Ni-MH/ni-cd: 4-12NIMHHagh: 21gSize: 32*24*7mmSimonk 30A:This Hardware, With SimonK Firmware