TECNOIOT 2pcs SIM800L GPRS GSM Module PCB Antenna SIM Board Quad band

• 【SIM800L】Chip: SIM800L; Voltage: 3.7-4.2V
• Compatibility: China Mobile, China Unicom and global quadband network
• Compact design: Serial TTL port for serial port, you can connect it directly to the microcontroller. No need MAX232
• High performance: Serial TTL port for serial port, you can connect it directly to the microcontroller. I don't need a MAX232. The power module starts automatically, the network is brought to the destination search. The onboard signal lights up all the way. It flashes slowly when a signal is present, and fast when there is no signal

2pcs SIM800L GPRS GSM Module PCB Antenna SIM Board Quad band for MCU Arduino DESCRIPTION: Chip: SIM800L Voltage: 3.7-4.2V Support networks: China Mobile, China Unicom and global quad-band network Module size: 2.5cmx2.3cm TTL serial port for serial port, you can link directly to the microcontroller. No need MAX232 Power module automatically boot, homing network Onboard signal lights all the way . It flashes slowly when there is a signal, it flashes quickly when there is no signal Suitable for xDrip Parakeet project Caution! : This module itself uses input voltage of 3.7V – 4.2V. Therefore, if you directly connect the Vcc pin to Arduino 5V pin, it might damage the module as well. Useful Link: Quick start - http://www.ayomaonline.com/programming/quickstart-sim800-sim800l-with-arduino/ GitHub - https://github.com/stephaneAG/SIM800L Code – http://www.davidjwatts.com/youtube/sim800l.ino http://www.seeedstudio.com/wiki/GPRS_Shield_V2.0 Others - http://www.ayomaonline.com/iot/sim800-controlling-arduino-with-sms/ http://arduinodev.com/arduino-library-for-gprshttp-communication-with-sim800/ PACKET CONTAINS: 2 x SIM800L GPRS GSM Module 2 x Coiled Antenna Pin headers