RJ45 Coupler Usage: Connecting 2 male network cables together and extend the length of network cable. RJ45 Coupler Meets Category 6 performance in compliance with the TIA/EIA 568-C.2 standard. RoHS compliant. Ethernet Cable Extender: Using this RJ45 in-Line Coupler can save cost and time compared with replacing a network with insufficient length. They have nickel-plated contacts and snap-in fixtures to aligned accurately and safely to achieve reliable connections. RJ45 Ethernet couplers are compatible with Cat7/ Cat6/ Cat5 and Cat5e networks.