Please note: Raspberry Pi and micro SD in pic not includedThis 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.SpecificationsGeneralRaspberry Pi connectivity, compatible with Raspberry Pi 2B/3B/4B/Zero/Zero W/Zero WH/Zero 2WSupports SMS, phone call, GPRS, DTMF, HTTP, FTP, MMS, email, etc.Support GPS, COMPASS, Glonass, LBS base station positioning, omni-positioningBluetooth 3.0, supports data transferring through BluetoothOnboard 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 holderBaudrate 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 99Comes with development resources and manual (examples for Raspberry Pi/Arduino/STM32)GSM/GPRSBandGSM 850/EGSM 900/DCS 1800/PCS 1900 MHzQuad-band auto searchCompliant to GSM phase 2/2Emitting powerClass 4 (2W @ GSM 850/EGSM 900 MHz)Class 1 (1W @ DCS 1800/PCS 1900 MHz)GPRS connectivityGPRS multi-slot class 12 (default)GPRS multi-slot class 1~12 (configurable)GPRS data featureDownlink speed: max 85.6kbpsUplink speed: max 85.6kbpsCoding schemes: CS-1CS-2CS-3CS-4Supports PAP (Password Authentication Protocol) for PPP connectionSupports PBCCHSupports USSDSMSSupports: MT/MO/CB/Text/PDU modeSMS storage: SIM cardAudioVoice encode/decode mode: Half RateFull RateEnhanced Full RateAdaptive muti rateSupports echo cancellationSupports noise reductionGNSSReceiver type33 tracking channels99 acquisition channelsGPS L1 C/A codeSensitivityTracking: -165 dBmCold starts : -148 dBmTime-To-First-FixCold starts : 28s (typ.)Hot starts : < 1sWarm starts: 26sAccuracyHorizontal position : <2.5m CEPBluetoothInte