2pcs VGA Female Video Extender Plug to LAN CAT5 CAT5E CAT6 RJ45 Network Adapter Connectors: VGA female / RJ45 Ethernet port female Allow transmitting signal between VGA video ports for distances up to 66ft (approximately 20 meters) over CAT5, CAT6 Ethernet cable (cable not included) You need a pair/2pcs of these at least to work Size: 5 x 3.3 x 1.8cm