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The AtomS3U is a USB flash drive-type - multi-functional development board. It uses the ESP32S3 main control chip, a dual-core Xtensa LX7 processor with a 240MHz clock speed, and built-in WiFi. Its interfaces include a USB-A port (supports OTG), one port, and a 6-pin @ 2.54mm female header (including four GPIO pins). Peripherals include one PDM microphone, one infrared LED, and one programmable RGB-LED. This product can be used in IoT human-computer interaction, voice input/recognition (STT), IO control, and other scenarios.