Features: ESP32S3-SIM7670G-4G is a multifunctional microcontroller development board with an integrated SIM7670G 4G communication module. Utilizes the ESP32S3R2 chip, integrating low-power WiFi and BLE 5.0, with built-in external 16MB Flash and 2MB PSRAM. Hardware encryption accelerates, random number generation, HMAC, and digital signature modules meet IoT security requirements. Equipped with a SIM7670G Cat-1 4G communication module for mobile network connectivity, meeting low-power requirements for IoT, mobile devices, outdoor monitoring, smart homes, and other applications. Uses the ESP32S3R2 chip with a high-performance 32-bit LX7 Twocore processor, capable of running at 240MHz. Features 512KB SRAM, 384KB ROM, 2MB PSRAM, and 16MB Flash memory. Integrated 2.4 GHz WiFi and Bluetooth-compatible LE dual-mode wireless communication. Specifications: Item: ESP32S3-SIM7670G-4G Development Board Chip: ESP32S3R2 Support: WiFi and BLE 5.0 Cat-1 4G Battery: 18650 battery NOT included Size: As shown Note: Due to lighting effects and shooting angles, there may be some tolerances in the product. Please understand. Please allow 0-1 cm error due to manual measurement. Package Includes: 1 Set ESP32S3-SIM7670G-4G Development Board