![SIM900A module core board SIM900A module core board](https://www.bifelectronic.com/2531-large_default/sim900a-module-core-board.jpg)
1.On board SIM900A double-frequency 900/1800 MHZ highly integrated GSM/GPRS module.
2.On board IPX patch antenna, convenient external GSM antenna.
3.On board 40 P FPC/FFC flexible ribbon cable connector, convenient link control panel.
4.On board UART interface, meet different user requirements.
5.PCB board size: 55 (mm) x 30(mm).