Features: A multifunctional and good performances microcontroller development board with builtin A7670E 4G communication module, universal camera interfaces, card slot, colorful light, 18650 battery slot, battery measurement, solar charging interfaces and other peripherals. The ESP32S3-S3R2 chip it use integrates low-power WiFi and BLE5.0, external 16MB Flash and 2MB PSRAM Builtin hardware encryption accelerators, random number generates, HMAC, and signature module to meet the security requirements of the Internet of Things. Paire with the A7670E Cat1 4G communication module Use ESP32S3-S3R2 as main chip, equipped with good performances 32-bit LX7 processorWith a main frequency of up to 240MHz, integrated with 384KB memory, 2MB PSRAM, 16MB Flash memory, 2.4GHz WiFi, and low-power BluetoothcompatibleLE Wirelessly communication with superior performances supporting 4G Cat1 internet access, GNSS positioning, telephone and other function Specifications: Item：ESP32S3 A7670E 4G Board Main chip：ESP32S3-S3R2 Builtin A7670E 4G Communication Module Support: WiFi and BLE5.0E Storage:External 16MB Flash and 2MB PSRAM Battery: with 18650 battery Slot, Without Battery Package Includes: 1Set ESP32S3 A7670E 4G Board（without battery） note: Due to the problemsof lighting effects and shootingangles, there will be tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.