Dual channel H-bridge driver, higher working efficiency. Large filter capacitors and freewheeling protection diodes are more stable and reliable. The upgraded product has a heatsink, which improves reliability, and the power circuit realizes a perfect PID closed-loop design. The board has a high-speed switch. Generally speaking, a brushless motor needs 60kHz PWM frequency, and this board is designed with 200kHz switches. It is suitable for various toy car motors, semiconductor refrigeration guides, DC motors, and electromagnetic deflection coil controllers. The board can withstand high current excess and has a braking function to stop the motor quickly. The voltage range of single power supply for this board is 3 to 15V, which is fine if you use a power supply of less than 12V. 12V battery voltage as low as 3V can still work.