SIM900A 1800/1900 MHz Wireless Extension Module GSM GPRS Board Soldered:Without Soldered Pin The higher the voltage

The higher the voltage

SCL (I2C clock)

As many as possible include most of the chip IC package formats: TQFP48

Heat shrink is the lifeline of an engineer dealing with electronics and electrical circuits

Length: 82

SIM900A 1800/1900 MHz Wireless Extension Module GSM GPRS Board Soldered:Without Soldered Pin The higher the voltageFeatures: 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