OKY2223-8
SIM800L Module GSM GPRS SMS With Antenna For Arduino
Product Description
TTL serial port, directly connect to the microcontroller.
Charge the module, it will automatically boot and search for network.
Onboard signal indicator will always be flashing. It flashes slowly when there is a signal; it flashes quickly when there is no signal.
Chip: SIM800L
Voltage: DC 3.7-4.2V(1A current peak)
Support networks: Quad-band network
Module size: 2.5 x 2.3cm