Based on ESP32-S3 microcontroller with Xtensa 32-bit LX7 dual-core processor, capable of running at 240 MHz.; Built-in protection circuits such as power isolation and optocoupler isolation, Safe & Stable & Reliable; Integrated 2.4GH z W-Fi and Blue-T 5 (LE) dual-mode wireless communication, with superior RF performance.; Onboard RTC chip, supports scheduled tasks. Onboard USB Type-C port for power supply, firmware downloading and debugging.; Onboard power supply screw terminal, supports 5V power supply only. Onboard optocoupler isolation to prevent interference from external high-voltage circuit.