This product is a multi-functional, high-performance microcontroller development board Built-in A7670E4G communication module, universal camera interface, TF card slot, RGB color Lamp, 18650 battery slot, battery voltage measurement IC, solar charging interface and other peripherals. The ESP32-S3R2 chip it uses integrates low-power WiFi and BLE5.0, external 16MB Flash and 2MB PSRAM, built-in hardware encryption accelerator, random number generator, HMAC and digital signature module to meet the security needs of the Internet of Things. Paired with the A7670E Cat-1 4G communication module, it can realize mobile network connection and meet the low power consumption requirements in the fields of Internet of Things, mobile devices, outdoor monitoring, and smart homes. It uses ESP32-S3R2 as the main chip and is equipped with a high-performance Xtensa 32-bit LX7 dual-core processor with a main frequency of up to 240MHz. Integrated 512KB SRAM, 384KB ROM, 2MB PSRAM, 16MB Flash memory; Integrated 2.4GHz Wi-Fi and Bluetooth LE dual-mode wireless communication with superior radio frequency performance Equipped with A7670E-FASE cellular module, supporting 4GCat-1/2G Internet access and GNSS positioning; Phone calls, text messages and other functions; The onboard USB switching IC and setting switch can be switched to the USB port of A7670E. Used to access computer dial-up Internet access or debug cellular modules Onboard lithium battery charging, solar charging, power management, power measurement and related protection circuits, supports USB and solar charging, and can measure power in real time The onboard 18650 battery holder also leads to the VBAT pin header, which can be externally connected to a 3.7V battery for power supply, with anti-reverse connection protection. The board has a camera interface, Micro-SD card interface, USBport, 38PIN pin header, etc. Peripheral interface, can be easily expanded to implement functions The onboard multi-channel DIP switch can be used to switch the camera and USB channel to avoid interface conflicts. You can also set the power supply of some circuits to be on and off to reduce power consumption. It is equipped with GNSS high-precision ceramic antenna, OV2640 camera, small speaker and other peripheral accessories. It is also designed with an acrylic shell for easy use in applications. Provide complete supporting information manual (including tutorials, 4G anytime WiFi and Internet of Things and other sample programs) Due to different batches, the appearance, color and printed words of the product , which will not affect the use. Colour:Blue Board Material:PCB Package Contents: 1 * ESP32-S3 A7670E 4G Development Board KIT Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.