1.RJ45 coupler helps to extend Ethernet connection by connecting 2 short network cables together. It is plug and play, no driver and power supply required. It can easily extend your network connection. Female to female Ethernet coupler is suitable for Cat8 Cat7, Cat6, Cat5e, Cat5 network cables. 2.Ethernet female to female coupler Size:36x20x20 mm/1.4x0.8x0.8inch,Adapter type:Cat8/Cat7/Cat6/Cat5e/Cat5,Material:PC,Color:Black,In the package of: 20 x Cat6 coupler 3.Ethernet cable coupler is resistant to electrical interference, can withstand high or low temperatures, ensure strong signal and fast data transmission, and the full metal shielding protective layer can reduce signal interference. Compact design, suitable for home and office use. 4.Ethernet connector No driver required, plug and play. Just plug two Ethernet cables into the RJ45 jack to get a longer cable. Use these RJ45 ethernet extender adapters to easily extend your network connection.