Features: ● EFM8BB21F16G MCU, pipelined 8-bit C8051 core with 50 MHz maximum operating frequency. ● Dedicated high frequency driver, makes the start more smooth. ESC maximum speed is 500k eRPM. ● BLHeli-S firmware is designed for superior performance in multirotors, and uses hardware generatedmotor pwm for smooth throttle response and silent operation. ● Damped light does regenerative braking, causing very fast motor retardation, and inherently also doesactive freewheeling. ● Supports higher KV motor and more power load, more suitable for violent flight of racing drone. ● The code supports regular 1-2ms pulse width PWM input, as well as Oneshot and Multshot. The inputsignal is automatically detected by the ESC upon power up. ● Supports Dshot150, Dshot300 and Dshot600. Dshot is digital signal, anti-interference ability is stronger,and do not need throttle calibration. ● The silicone twisted-pair of the throttle signal cable increase the service life,and effectively reduces thecrosstalk caused by signal transmission, and makes flight more stable.