M35 GSM / GPRS Cell Phone Development Board Module w/ Voice Interface Antenna - Blue
GSM850 / GSM900 / DCS1800 / PCS1900 quad-band highly integrated GSM / GPRS board module; LM2596 high-power power chip ensures the module to work stably; Flip open SIM card slot is easy to use; The module can be powered by onboard wiring terminals or DC socket (the default is wiring terminal) input voltage: 7.5~12V; With audio interface and microphone suitable for talking test; UART interface can meet different demands; With 3 LED lights: power indicator light signal light incoming calls indicator light.