The linkskey lkr-604 is a high speed internet broadband router with a built-in 4-port switch. Connects up to four computers with the router¡¯s integrated switch by using the four 10/100mbps auto mdi/mdix ethernet ports. For extra pc connections, simply attach an ehternet switch to lkr-604 to expand the network. With the explosive growth of the internet, accessing information and services at any time, day or night, has become a standard requirement for most people. Networking technology is moving out of the exclusive domain of corporations and moving into homes with two or more computers. The linkskey lkr-640 is designed for both home and small business network. With the linkskey lkr-604 quick setup, anyone without background knowledge of networking will find the setup easy and simple. With advanced features, the linkskey lkr-604 provides higher security controls for corporate users. Features: supports pppoe and pptp protocol. Supports dhcp server / client. Supports upnp (universal plug and play). Supports nat (network address translation). Supports virtual server mapping. High speed data transfer rate. Web-based configuration graphical user interface. Specifications: model: lkr-604. Standards: ieee 802.3 10Base-t ethernet ieee 802.3U 100base-tx fast ethernet ansi/ieee 802.3 Auto-negotiation. Protocol: csma/cd. Data transfer rate: ethernet: 20mbps (full-duplex), 10mbps (half-duplex) fast ethernet: 200mbps (full-duplex), 100mbps (half-duplex). Topology: star. Network cables: 10base-t: cat. 3, 4, 5 (100 meters), 100base-tx: cat. 5 (100 Meters). Ports: lan: 4 x 10/100 mbp auto-mdix fast ethernet port, wan: 1 x 10/100 mbps auto-mdix fast ethernet port. Power input: dc 7.5V 1a. Power consumption: 3w (max). Temperature operating: 0o c to 40o c, storage: -10oc to 70oc. Humidity operating: 10% to 90%, storage: 5% to 90%. Dimensions: 171 x 100 x 33 mm (w x h x d). Certifications: fcc class b, ce mark b, vcci-ii. Package contents: 1 pcs linkskey 4-port cable/dsl router. 1 Pcs power adapter. 1 Pcs user guide.