SIM808 Shield is an Arduino compatible shield that based on SIM808 module, it offers 2G GSM and GPRS data along with GPS technology for satellite navigation. What’s it for: Receive GPS data and A-GPS data Send and receive SMS messages Send and receive GPRS data (TCP/IP, HTTP, etc.) Make and receive phone calls (External microphone and speaker is required) Output PWM , buzzer vibrational motor control Read value of analog voltage Features: Compatible with Arduino Uno, Arduino Leonardo, Arduino Mega Powered via Arduino USB connection or Arduino external power supply Communicates with Arduino via UART-TTL and digital input/output. Integrated GPS/CNSS and supports A-GPS Supports 3GPP TS 27.007, 27.005 and SIMCOM enhanced AT Commands Supports GPS NMEA protocol Supports Real Time Clock Uses standard SIM Card holder Specification: Quad-band 850/900/1800/1900MHz – 2G GSM network GPRS multi-slot class12 connectivity: max. 85.6kbps(down-load/up-load) GPRS mobile station class B GPS Receiver channels: 22 tracking / 66 acquisition Coarse/Acquisition code: GPS L1 Tracking sensitivity: -165dBm Time-To-First-Fix: Cold starts: 30s (typ.), Hot starts: 1s (typ.), Warm starts: 28s (typ.) Horizontal position accuracy: < 2.5m CEP Update rate: 5Hz Part List: 1 x SIM808 Shield - GSM/GPRS + GPS For any technical support and suggestions, please visit our blog page.