Description
- Chip : SIM800L
- Operating voltage : 3.7-4.2V
- TTL serial port for serial port, you can link directly to the microcontroller. No need MAX232
- Module size: 2.5cm*2.3cm
- 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