Unlocked New Huawei E3531 E3531s-2 E3531i-2 3G USB Modem 21.6 Mbps HSPA+Mobile Broadband 3G Modem Dongle
SPECIFICATIONS
Supported frequency bands:
3G: HSPA+/UMTS 2100MHz
2G: EDGE/GPRS/GSM 850/900/1800/1900MHz
HSPA+ data service of up to 21.6 Mbps
HSUPA data service of up to 5.76 Mbps
Equalizer and receive diversity (EEIC)
MicroSD Card slot
USB Stick, easy to connect
Plug and play
Standard USB interface (Type A)
Data and SMS service
Windows XP SP3 .Windows Vista SP1/SP2 .Windows 7 .Windows 8 (Does not support Windows RT)
Mac OS X 10.6, 10.7 and 10.8 with latest upgrades;
HiLink features (Driverless, Web UI, Auto connect)
More pictures :