The SIM7600G-H 4G HAT is a 4G/3G/2G communication and GNSS positioning module, which supports LTE CAT4 up to 150Mbps for downlink data transfer. it is pretty low power consumption. You can connect this 4G module with a computer to surf the Internet or attach it onto Raspberry Pi to enable functions like 4G high-speed connection, wireless communication, making telephone calls, sending SMS, global positioning, etc.

The SIM7600G-H 4G HAT supports telephoto calls and sending SMS by AT Commands using an onboard audio jack.

Based on cloud communication it supports TCP/UDP/FTP/FTPS/HTTP/HTTPS communication protocol.

Features: 

1. Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards, Jetson Nano
2. Supports dial-up, telephone call, SMS, TCP, UDP, DTMF, HTTP, FTP, etc.
3. Supports GPS, BeiDou, Glonass, LBS base station positioning
4. Onboard USB interface, to test AT Commands, get GPS positioning data, and so on
5. Onboard CP2102 USB to UART converter, for serial debugging
6. Breakout UART control pins, to connect with host boards like Arduino/STM32
7. SIM card slot supports 1.8V/3V SIM card
8. TF card slot for storing data like files, messages, etc.
9. Onboard audio jack and audio decoder for making a telephone call
10. 2x LED indicators, easy to monitor the operating status
11. Onboard voltage translator, the operating voltage can be configured to 3.3V or 5V via jumper
12. Baudrate: 300bps ~ 4Mbps (default: 115200bps)
13. Autobauding baudrate: 9600bps ~ 115200bps
14. Control via AT commands (3GPP TS 27.007, 27.005, and V.25TER command set)
15. Supports SIM application toolkit: SAT Class 3, GSM 11.14 Release 99, USAT

Note: the Raspberry Pi in the photo is NOT included.