FVT 40A Brushless ESC

FVT 40A ESC/Brushless Speed Controller (SKY II series) for RC Helicopter with BEC 

1.1 Output:  Continuous 40A, burst 60A up to 10 seconds.
1.2 Input Voltage:  2-6 cells lithium battery or 5-18 cells NiMH battery.   
1.3 BEC:  3A, 5.25V or 6V switchable by software.
1.4 Control Signal Transmission: Optical/electrical coupled system.
1.5 Max Speed:  210000rpm for 2 Poles BLM, 70000rpm for 6 poles BLM, 35000rpm for 12 poles BLM.
      (BLM = BrushLess Motor)
1.6 Size:  59mm (L) * 27mm (W) * 12mm (H).
1.7 Weight:  38g.