USAGE: BENFEI RJ45 Coupler extender is ideal for extending ethernet connection by connecting 2 short network cables together; FAST SPEED To 10 GIGABITE: The RJ45 connector can speed up to 10 gigabite for connecting Cat7/Cat6 ethernet cable; COMPATIBILITY: This 8P8C female to female Ethernet coupler jack is compatible with Cat7, Cat6 Cat5e, Cat5 network; HIGH PERFORMANCE: RJ45 inline jack coupler meets Category 6 performance in compliance with the TIA/EIA 568-C.2 standard. It is RoHS compliant.