OverviewThis is a handy, low power Raspberry Pi HAT which features multi communication functionalities: GSM, GPRS. It allows your Pi to easily make a telephone call, send messages, connect to wireless Internet, global position, transfer data, and so on. FeaturesRaspberry Pi connectivity, compatible with Raspberry Pi 2B/3B/3B+/Zero/Zero WSupports SMS, phone call, GPRS, DTMF, HTTP, FTP, MMS, email, etc. Support GPS, COMPASS, Glonass, LBS base station positioning, omni-positioningSupports data transferring through BluetothOnboard USB TO UART converter CP2102 for UART debugging6x LEDs for indicating the module working statusSIM card slot for 1.8V /3V SIM cardRTC with backup battery holder