SIM800L GPRS module adapter board GSM microSIM card[CEL-00009]products model : CEL-00009

Module type: SIM800L
Working voltage: 3.7~4.2V
The size of the module: 2.5cmx2.3cm

TTL serial port, can be directly linked with single chip microcomputer. Don't need

MAX232

Automatic startup power module, automatic network

Onboard signal lights all the way.
It flashes slowly when there is a signal, it flashes quickly when no signal.