The TL-SM311 series Fiber Module Cards are introduced for extending transfer distance, attached to the managed/web smart switches. They can extend the distance to several kilometers even tens of kilometers which can basically satisfy the distance requirement of LAN. Users can choose whether & which items to use the fiber modules according to the demand in order to lower cost. Features Supports Full-Duplex Plug-&-Play Supports Pull-or-Plug with power on switches Power: internal power from switches Suitable Products: TL-SG5428, TL-SL5428E, TL-SG3210/3216/3424/3424P, TL-SL3428/3452, TL-SG2216/2424, TL-SL2210WEB/2218WEB/2428WEB/2452WEB, TL-SL1351 & MC200L Please note: networking components such as switches, routers, UPS & wireless devices require that speeds & standards be consistent throughout the network to gain optimum performance. To avoid compatibility clashes or for advice, please contact us on solutions@ebuyer.com.