SIM900 Quad-band GSM / GPRS Cell Phone Development Board w/ Voice Antenna - Deep Blue
With GSM / GPRS module; LM2596 large power chip assuring long stable working time; On board SIM card slot convenient to install and remove SIM card; On board wire terminals orDC power supply; Input voltage: 7.5~12V; With audio interface and microphone convenient to test talking; On board UART interface meeting various needs; On board three LED indicator lights: power signal incoming call