PERFECT SOLUTION --- Solves the problem of the router not having enough ports: This adapter's advantage: Laptop in three different fixed positions is often used back and forth which is very troublesome, the network cable leads to one breaking, this RJ45 1 to 3 way RJ45 Ethernet splitter saves you from having to pull the cable back and forth. POWERFUL FUNCTION --- Use this RJ45 Ethernet splitter cable to easily convert one RJ45 connection into two RJ45 sockets. Allows two computers to share high-speed DSL, cable modem, and Ethernet ports without the need for a router, by extending one RJ 45 socket to two standard 8P8C designs. HIGH QUALITY --- Built-in driver circuit on 2mm thick PCB board to avoid damage to conductor leakage. Ensures longer lifespan. Pure copper plated gold tip (eight cores): more stable transmission, excellent connection and transmission. The solid RJ45 female socket protects against external electromagnetic signal interference to prevent damage to the internet signal. WIDE APPLICATIONS --- This RJ45 1 to 3 RJ45 Ethernet splitter helps you avoid pulling cables back and forth and avoid cable breakage. It can also be used as an extension, it is made of high-quality materials and has smooth transmission. It is compatible with ADSL, hubs, switch, TV, set-top box, router, wireless device, computer, suitable for Cat5, Cat5e, Cat6, Cat7. WARM TIPS --- This is a high-quality product with a PCB board inside. However, be careful, the Ethernet splitter does not create two Ethernet ports from one, meaning you cannot use two computers simultaneously with this splitter. ONE AT A TIME, does not support all computers connecting to the internet at the same time.