This product is a versatile, high-performance microcontroller development board designed by , incorporating A7670E 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. 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 , 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 functions. Onboard multiple dip switches for switching between camera and USB channels, avoiding interface conflicts. It can also set the power on/off of certain circuits to reduce power consumption. Provides comprehensive documentation (including tutorials, 4G portable WiFi, and IoT example programs) in English. Note Do not include 18650 battery Multi Band Support Of LTE Cat-1/2G: Multi Band And Multi Regions Support, Mainly Applicable In Europe, Southeast Asia, West Asia, Africa, China, South Korea Overview ESP32-S3 A7670E 4G Development Board: Based on ESP32-S3, it integrates A7670E 4G module, camera, Micro-SD, and peripherals and interfaces. Suitable for IoT applications such as 4G portable WiFi, telephone messaging, GNSS positioning, and 4G Cat-1/2G/WiFi. Parameters Communication Parameters: Supported Bands: LTE-FDD: B1, B3, B5, B7, B8, B20 Data Transmission: 5Mbps (UL) 10Mbps (DL) GNSS: GPS, Beidou, GLONASS Operating Parameters: Power Supply: USB, 3.7V Lithium Battery, Pin Header Supply Voltage: 5V (USB Port or 5V Pin Header), 3.7~4.2V (18650 Lithium Battery Interface or VBAT Pin Header) Logic Level: 3.3V Application Areas Image Recognition: Recognition, Object Recognition Portable WiFi: On-the-go Internet Access Smart Industry: Smart Warehousing/Workshops, Unmanned Operations Material: PCB Color: As shown Package Contents: 1 x Development Board 1 x Speaker 1 x USB Cable 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.