Overview
This is a handy, low power Raspberry Pi HAT which features multi communication functionalities: GSM, GPRS, GNSS and Bluetooth.
It allows your Pi to easily make a telephone call, send messages, connect to wireless Internet, global position, transfer data via Bluetooth, and so on.

Features
Standard Raspberry Pi 40PIN GPIO extension header, compatible with Raspberry Pi Zero/Zero W/Zero WH/2B/3B/3B+/4B and later versions
Supports SMS, phone call, GPRS, DTMF, HTTP, FTP, MMS, email, etc.
Support GPS, COMPASS, Glonass, LBS base station positioning, omni-positioning
Bluetooth 3.0, supports data transferring through Bluetooth
Onboard USB TO UART converter CP2102 for UART debugging
6x LEDs for indicating the module working status
SIM card slot for 1.8V/3V SIM card
RTC with backup battery holder
Baudrate auto detection (1200bps ~115200bps)
Control via AT commands (3GPP TS 27.007, 27.005, and SIMCOM enhanced AT Commands)
Supports SIM application toolkit: GSM 11.14 Release 99
Comes with development resources and manual (examples for Raspberry Pi/Arduino/STM32)

Package Contains
GSM/GPRS/GNSS HAT x1
GSM Antenna x1
GPS External Antenna (B) x1
Bluetooth Antenna x1
USB type A plug to micro plug cable x1
RPi screws pack (2pcs) x1

For more details you need to know, pls firstly send me message via Amazon, I will then send attached link including User Guide for you, thank you for patience.;D