Equipped with high-performance Xtensa 32-bit LX7 dual-core processor, clocked at up to 240 MHz Supports 2.4 GHz Wi-Fi (802.11 b/g) and Bluetooth 5 (LE), onboard antenna Built-in 512KB SRAM and 384KB ROM, stacked 2MB PSRAM and external 16MB Flash ESP32-S3-SIM7670G-4G (hereinafter collectively referred to as the development board) is a multi-functional, high-performance microcontroller development board. The board contains SIM7670G 4G communication module, universal camera interface, TF card slot, RGB colorful lights, 18650 battery slot, battery voltage measurement IC, solar charging interface and other peripherals. The ESP32-S3R2 used is an integrated low-power It is a system-on-chip (SoC) that consumes Wi-Fi and BLE5.0, and also has external 16MB Flash and 2MB PSRAM. The hardware encryption accelerator, , HMAC and digital signature (Digital Signature) module inside the Soc can meet the security requirements of the Internet of Things. The SIM7670G 4G communication module used provides mobile network, and combined with ESP32-S3R2, it can realize portable WIFI, IoT data transmission and other functions. A of low-power working states meet the power consumption needs of application scenarios such as the Internet of Things (IoT), mobile devices, outdoor monitoring, and smart homes. 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 SIM7670G 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.