【MCU Isolation】5V isolation shields MCU from interference; onboard 5V LED displays working status
【Voltage & Heat Dissipation】Built-in voltage indicator for real-time monitoring; reserved pads support simple heat sink mounting for steady heat dissipation
【4-Wire Simple Wiring】Only 4 wires (GND,5V,PWM1,PWM2) for MCU connection; isolated 5V power can share MCU power supply directly