Ethernet 1 to 3 SplitterDoes not support 3 computers connected to the Internet at the same time. (Note: This product is not a switch, so three computers cannot share the Internet at the same time, only one output port is supported.) CompatibilityThis 1 to 3 RJ45 Ethernet Splitter helps you avoid pulling cables back and forth and prevent cable breaks. It is compatible with ADSL, hubs, switches, TV, set-top box, router, wireless device, computer, suitable for Cat5, Cat5e, Cat6, Cat7. Excellent connection and transmission performance: the cable splitter Ethernet uses gold-plated needle core, metal shielding, fixed RJ45 interface, shielding from the outside world EML, RFI such as electromagnetic interference, the transmission signal is more stable to ensure signal transmission. Best DesignUse this RJ45 splitter when you regularly use a laptop in 3 different rooms, it helps you don't have to run your network cable back and forth between the three rooms and you don't have to no need to worry about not having internet in your room. Note: When you are connected to three devices, you can switch flexibly by clicking the disconnect network and connecting to network programs are two devices. You will need to disable the device's auto-network feature in settings or unplug the device that is not connected. Otherwise, three devices will not be able to connect to the network because the three devices stack each other.