... Ethernet switch with automatic speed-sensing and crossover correctionInterface WAN Interface-Single-mode, bi-directional single fiber, dual Fiber (Optional ... ,PPPoE, DHCP ,PPTP,UDP, NAT, DNS,DDNS,VPNPort LAN:4*100BaseTX (Auto MDI/MDIX)Port WAN:1*100Base optical ... ~ 95% non-condensingPower: External DC Power Adapter (linear);(Output DC9V,1A;Input 110V/220V) 4-port ethernet fiber optic wireless router