This is a small SIM800L GPRS GSM Module Micro SIM Card Core Board Quad-band TTL Serial. This module is a miniature GSM modem, which can be integrated into a great number of IoT projects. It is used in GSM-based projects, GPS-based projects, Robotics projects, or 8051/AVR/ARM/PIC/Arduino/Raspberry-pi-based etc projects.
Specifications : Size:30.6*17.7mm Model: SIM800L Work Voltage:DC 3.3V Controller IC:SIM800L Communication:SPI Work Temperature:-25℃~85℃ Work Humidity:5%~95%RH