Overview
This is a telecommunication HAT which features multi communication functionalities: NB-IoT (NarrowBand-Internet of Things), Cat-M (aka eMTC, enhanced Machine Type Communication), and GNSS (Global Navigation Satellite System).
With the developing of telecommunication technology LTE, 2G/3G networks are fading away, the future world would be dominated by IoT technologies consisting of low bandwidth NB-IoT/Cat-M and high bandwidth 4G/5G standards.
This HAT supports global bands of NB-IoT and Cat-M, as well as positioning function. Due to its advantages like small size, low delay, and wide coverage, it is the ideal choice for IoT applications such as intelligent instruments, asset tracking, remote monitoring, e-health, and so on.

Features
Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards
Supports communication protocols such as TCP/UDP/HTTP/HTTPS/TLS/DTLS/PING/LWM2M/COAP/MQTT
Supports GNSS positioning (GPS, GLONASS, BeiDou, and Galileo)
Onboard USB interface, to test AT Commands, get GPS positioning data, and so on
Breakout UART control pins, to connect with host boards like Arduino/STM32
Onboard voltage translator, 3.3V by default, allows to be switched to 5V via onboard jumper
SIM card slot, supports ONLY 1.8V SIM card (3V SIM card is not available)
3x LED indicators, easy to monitor the working status
Baudrate: 300~3686400 bps
Common baudrate auto-negotiation: 9600/19200/38400/57600/115200 bps
Comes with development resources and manual (examples for Raspberry Pi/Arduino/STM32)

Package Contains
SIM7080G Cat-M/NB-IoT HAT x1
LTE antenna x1
GPS External Antenna (B) x1
USB type A plug to micro plug cable x1
2×20PIN female header x1
RPi screws pack (2pcs) x1

For more resources you may need, pls contact me via Amazon message, i will send you then via attachment.