Help getting started with Roku devices, including setup, connecting your device to your TV, linking a Roku device to your account at my.roku.com/link, adding channels, subscribing to services, and more.
Re: ONLY 1 HDMI PORT HOW ELSE CAN I CONNECT MY ROKU?
Another option is adding an AV Receiver. More expensive than an HDMI switch, naturally, since you have to get speakers as well. But the audio quality improvement over the TV speakers might make it worth it for you. And you don't have to have a full 5.1 system. Just a simple 2.0 or 2.1 setup would sound worlds better. And most AVRs have at least 3 HDMI ports, with 4-5 being more typical.
Dan Roku Stick (3600), Ultra (4640), Ultra (4670), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.
You don't want this item. It is a SPLITTER which takes one HDMI input (from your Roku in this case) and splits it into two identical HDMI outputs (which could be connected to two devices, like a TV and an audio receiver, or two TVs).
You need to connect your two HDMI devices to a SWITCH and connect the output of the switch to the TV's single HDMI input. With the switch, you can choose which of the two inputs to send to the TV.