RJ45 Splitter Adapter LAN Ethernet Kabel 1-2 Wege Dual Buchse Port Stecker

NOTE: For 1 to 2 ports splitter: If you want 2 devices surf the internet simultaneously, you need to use 2 adapters as shown in picture 2; if you use only 1 adapter,ONLY THE RIGHT SIDE of the 1 to 2 port coupler WORK AS A CABLE CUPPLER and not as a Splitter.

eBay