[WIDE COMPATIBILITY] iwillink ethernet coupler is compatible with Cat6, Cat5e, Cat5 network cables. Compact size: 1.19in L x 0.6 in W x 0.67 in H. [HIGH-SPEED DATA TRANSMISSION] Transmission speed of ethernet to ethernet coupler up to 1000 Mbps with no loss of data speed or quality. [IWILLINK CAT6 COUPLER] Fire-retardant and impact-resistant housing ensures safety. Gold-plated contacts effectively reduce the proximal crosstalk and resist corrosion. [EASY TO USE] No drivers are required, just insert two ethernet cables into the RJ45 jack to get a longer cable. The plug and play design is flexible for use in a variety of scenarios. [MULTI-SCENSE APPLICATION] Widely used in home, company, surveillance, engineering and other network cabling. RJ45 coupler can be used with Cat6 and backward compatible with Cat5, Cat5e ethernet cables.