Support networks: China Mobile, China Unicom and global quad-band network
Module size: 2.5cmx2.3cm
Warning: Last items in stock!
TTL serial port for serial port, you can link directly to the microcontroller. No need MAX232
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