Based on 40PIN GPIO interface design, suitable for series motherboards Support network communication protocols such as TCP/IP, HTTP(s), MQTT(s), (s) and Supports GNSS positioning and can obtain location information through satellite signals Onboard USB interface can be used to test AT commands, network communications, etc. There are 3 USB expansion ports onboard to facilitate the access of USB expansion devices. Onboard SIM card slot, supports 1.8V and 3V SIM cards Onboard 2 module LED indicators and 4 USB LED indicators easy to check the module operating status Onboard resources: 1. USB1 expansion interface supports expansion access of external USB devices 2. USB main interface and power supply interface, which can be connected to windows, Raspberry, and Nano to expand USB access 3. USB2 expansion interface supports expansion access of external USB devices 4. USB3 expansion interface supports expansion access of external USB devices 5. Type-C, functions the same as USB interface 6. GNSS antenna, supports IPEX1 generation and SMA packaging 7. LTE antenna, supports IPEX1 generation and SMA packaging 8. 4Pin DIP switch, controls the SIM7670G module UART to connect to the , uses the pin to control the module to turn on and off and enter the burning mode. 9. 40Pin GPIO interface 10. SIM Card slot (this SIM Card slot does not support hot swapping, please turn off the power when replacing the SIM Card) 11. Reserved test points, can be connected to MCU externally to use module resources Due to different batches, the appearance, color and printed words of the product , which will not affect the use. Colour:Blue Material:PCB Package Contents: 1 x 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.