Generic Sim800l Gprs Transfer Board Micro Sim Gsm Core Ttl Port...

Chip: SIM800L
Voltage: 3.7-4.2 V
Network support: China Mobile, China Unicom and the global four-way network
Module size: 2.5 cm x 2.3 cm
Ttl Serial port for serial port, you can connect directly with the microcontroller. No need for MAX232
Power module automatically loads home network
Built-in signal lights. It blinks slowly when there is a signal
It flashes quickly when there is no signal.

Package includes:

1 x Small SIM800L GPRS GSM module Card Quad-board onboard + antenna
Voltage : 3.7V To 4.4V
Module size: 25 X 23 mm
Quad-band 850/900/1800/1900MHz
Supports 3.0V to 5.0V logic level
100 Percent brand new and high quality