SIM800A Wireless Extension Module SMS GSM GPRS STM32 Development Board

Feature: Size: 80*50*8mm Voltage: 5V-18V Serial communication TTL serial port and RS232 serial port, TTL serial port compatible with 51, SIM32, ARDUINO and so on Reserved voice interface, you can directly access mic, headphones and other equipment Package includes: 1 x SIM800A Wireless Extension Module 1 x Antenna
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