This is Small SIM800L GPRS GSM Module Micro SIM Card Core Board Quad-band TTL Serial Port with the antenna, in this module two antennas have been included.
- TTL serial port for serial port, you can link directly to the micro-controller.
- Don’t need MAX232.
- Power module automatically boots, homing network.
- Onboard signal lights all the way.
- It flashes slowly when there is a signal, it flashes quickly when there is no signal.