With SOS Call button and tow-way voice function
GSM Dialer/SOS Call is a Brevity,Fashion,Neat design Emergency call unit, it is special for emergency call out for help. It is suitable for senior, elderly, or community area, public area for emergency call.
USB GSM GPRS Edge Module – Simcom
LM003 3G HSUPA USB modem is an unlocked 3G modem
WAVECOM Q2403A PCI GPRS MODEM speed
Quectel UC20 is a series of powerful function UMTS/HSPA+