Equipped with high-speed, small-sized, multifunctional MCU.Full protection feature including low-voltage protection, over-heat protection, signal lost protection, safe power on protection, and self-check functions.4 seconds very soft start performance which is very suitable for helicopters.Excellent startup performance, great throttle linear and quick throttle response, excellent low-speed performance.Max speed: 240,000 RPM (2 poles), 80,000 RPM (6 poles), 40,000 RPM (12 poles).Individual power circuit for MCU and BEC to improve anti-interference capability.The parameters of ESC can be configured via program card or transmitter.Built-in linear BEC or switch mode BEC.The low-voltage threshold and start-up power can be programmed quantized and precisely by program card.Throttle range can be configured to be compatible with different receivers.Three throttle curve options make helicopter control more flexible.Motor reverse rotation available.Specification:Input voltage: 3V -9V (support 1-2 lithium batteries)Continue current: 7ABurst current: 9A (within 10 seconds)BEC output: 1A/5V (linear)Program Function: YESColour:Red + whiteMaterial:PCBSize:22x12x5 mmPackage Contents:2 * ESCOnly the above package content, other products are not included.Note: Light 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.