It's a complete Quad-band GSM/GPRS solution in an LGA type. SIM800A Quad-band contains the Transmit voice, SMS and data information with low power consumption, and it controls and monitors the remote data. The specifications in GSM/GPRS include the input voltage of 9 to 12, and its overall weight and height are a handy way and more compact.

SIM800A mode contains the GSM chip, and the user interface of RS232 enables one to connect with any gadget like a laptop or computer. It is processed with the USB connections or micro-controller using the RS232 receiver to find the output with TTL standard. With the USB serial adapter, you want to see the correct COM port of the device manager to use the connector of the RS232 to connect with the SIM800A modem. Once it connects with the Serial connection, it starts to send the AT commands.