1Safety power function: no matter where the throttle lever is, the motor will not start immediately. 2Throttle calibration function: adapt to different longdistance throttle stroke differences, improve the linearity of throttle response. 3With smoothly, delicate hand feel and excellent speed performance, low voltage protection mode, low voltage protection threshold. 4Power input: 5.6V16.8V (23 lithium polymer batteries, or 512 niMH/NiCd batteries). 5Constant current: 30A (Max. 40A less than 10 seconds), suitable for drone quadcopter. Condition: 100% Brand NewItem Type: ESCMaterial: Electronic Components Color: YellowWeight: 25 g / 0.9 oz(approx.)Size: Approx. 45 x 24 x 11mm / 1.8 x 0.9 x 0.4inPower Input: 5.6V-16.8V (2-3 lithium polymer batteries, or 5-12 ni-MH/Ni-Cd batteries)BEC: 2AConstant Current: 30A (Max. 40A less than 10 seconds)Features:Safety power function: no matter where the throttle lever is, the motor will not start immediatelyThrottle calibration function: adapt to different distance throttle stroke difference, improve the throttle response linearity, with smoothly, delicate hand feel and excellent linear speedLow voltage protection mode, low voltage protection threshold 1 x ESC