Function: The RJ45 coupler helps extend the connection between the two Ethernet cables to reach the extension. Compatibility: they are compatible with Cat7,Cat6, Cat5e, Cat5 network cable Simple use: Female to Female standard RJ45 coupler uses simple plug and play Stable signal transmission: gold-plated contacts and 8-core pure copper-plated conductor provide strong guarantees for high-speed data transmission. RJ45 Adapter is compatible with various occasions and equipment, such as PC, Laptops, TV, Routers, Switch, Printers, Projectors, etc. Quality after-sales service, any questions at any time contact the seller customer service.