Yes, you can! Roku 4K devices are designed to be backward compatible, meaning that they can connect and work with non-4K TVs. When you connect a Roku 4K streaming stick to a non-4K TV, the content will be displayed in the maximum resolution that the TV can handle. For example, if you have a 1080p TV, the Roku 4K will output content at 1080p. This allows you to enjoy a high-quality viewing experience, even without a 4K TV.