The BLW-04SAG is a small desktop router that sits between your local Ethernet network and a remote network (e.g., the Internet). The BLW-04SAG contains a WAN port connecting to an external ADSL/Cable modem, a DMZ port, a four-port 10/100Mbps Ethernet switch for connection to PCs on your local wired network, and one wireless interfaces for connection to your local wireless 802.11a/b/g network supporting a data rate of up to 108 Mbps.