SIM900A 1800/1900 MHz Wireless Extension Module GSM GPRS Board Soldered:Without Soldered Pin You must solder some components

You must solder some components on the top surface and some components on the bottom side of the board

4-channel driver

This module uses the 5V power supply

L298P drives 2 DC motors or stepper motor

This chip likes to be used with 2-3

SIM900A 1800/1900 MHz Wireless Extension Module GSM GPRS Board Soldered:Without Soldered Pin You must solder some componentsFeatures: On board two power supply interface VCC5 5 V VCC4 interface 3. 5 power supply. 4. 5 V optional power supply of envelope that (default) and control to start On board SMA (default) and IPXmini antenna interface SIM900A reserved interface reset? The size of the module is 49 * 50, all the new and original device. The computer can provide the power supply of the USB debugging module of the computer, A large amount of data under the recommended