RJ45 coupler use to connecting two male ethernet cables together and extend the length of ethernet cable. Network Coupler meets Category 6 performance, TIA/EIA 568-C.2 Verified, FCC, RoHS Compliant. 8P8C female to female ethernet coupler jack is compatible with Cat6/Cat5e/Cat5 network cable. Ethernet Coupler connection is firm, not easy to fall off, suitable for all kinds of places, note: not waterproof. We offer 2 year after service. This Network cable coupler with eco-friendly ABS cover to protect you and your families/ friends safe always.