This product is a versatile, high-performance microcontroller development board designed by Waveshare, incorporating A7670E 4G communication module, OV universal camera interface, TF card slot, RGB colorful lights, 18650 battery slot, battery voltage measurement IC, solar charging interface, and other peripherals. It utilizes the ESP32-S3R2 chip, integrating low-power WiFi and BLE5.0, external 16MB Flash, and 2MB PSRAM. The chip also features a hardware encryption accelerator, random number generator, HMAC, and digital signature module, meeting the security requirements of IoT. Paired with the A7670E Cat-1 4G communication module, it enables mobile network connectivity, catering to low-power requirements in IoT, mobile devices, outdoor monitoring, smart homes, and more. Powered by ESP32-S3R2 with a high-performance Xtensa® 32-bit LX7 dual-core processor, operating at up to 240MHz. Integrated with 512KB SRAM, 384KB ROM, 2MB PSRAM, and 16MB Flash memory. Integrated 2.4GHz Wi-Fi and low-power Bluetooth (Bluetooth LE) dual-mode wireless communication with superior RF performance. Equipped with A7670E-FASE cellular module, supporting 4G Cat-1/2G internet access, GNSS positioning, telephone, and messaging functions. Onboard USB switching IC and setting switch, switchable to A7670E's USB port for computer dial-up internet or cellular module debugging. Onboard lithium battery charging, solar charging, power management, battery voltage measurement, and related protection circuits. Supports USB and solar charging, with real-time battery level measurement. Onboard 18650 battery slot, with exposed VBAT pin header for external connection of 3.7V lithium battery power, equipped with reverse connection protection. Rich peripheral interfaces including camera interface, Micro-SD card interface, USB port, 38PIN header, facilitating easy expansion for various functio