The EVDO/HSDPA-WiFi Router lets you share your broadband Internet access quickly and easily with connection to a 3G/2G (EVDO / HSPA / TD-SCDMA / EDGE) USB modem. It can be an alternative or backup to ADSL/cable modem and reduce the cost for multiple 3G subscriptions.
You just need to connect the router to a USB modem via the USB port, and then each WiFi-enabled device (such as a notebook, desktop PC, PDA, game console, cell phone, MP3 player) can connect to the Internet when within the range of the router. The router can support 20 to 30 users.
See the overview of 3g WiFi Router here.