RJ45 Coupler Ethernet Connectors Hielded inLine Coupler for Cat7Cat6Cat5eCat5 Ethernet Cable Extender Connector Female to Female Black20 Pack

Ethernet Cable Connector: Black 20 pack Allows you to connect two short ethernet cables into reasonable length without the need to buy longer ones. RJ45 couplers are metallic shielded It is fully shielded to prevent electrical interference. Plug and play, work perfectly. Thickened PCB Board, Robust and Durable Supports POE applications over Ethernet patch cables compatible with Cat7/ Cat6/ Cat5e/ Cat5 network cable. Please Note This can not use with a keystone jack. It is not for a phone cable, but for an Ethernet cable. They are only compatible with RJ45, NOT compatible with RJ11.