Earlier this year at CES, Roku announced that it was working with manufacturers to create inexpensive 4K TVs that run on the streaming service's own operating system. The first sets made with Insignia were announced earlier this month, and now Chinese TV maker TCL has added its own devices to the mix. The company's 55-inch and 65-inch S-series 4K Roku TVs both go on sale today on Amazon, with the smaller set going for $599.99 and the larger for $999.99.

The pricier p130 series comes with voice search-enabled remote

TCL also announced pricing for a further four Roku sets in its P130 series, but did not specify when they would be available to buy. (Some time in the next couple of weeks is the estimate.) These come with an "enhanced remote" that has a headphone jack for private listening, voice search, and a finder feature in case you lose it. The series starts with a 43-inch set for $499.99, a 50-inch model for $599.99, a 55-inch set for $699.99, and a 65-inch one for $1,099.99.

It'll be interesting to see whether or not TCL's sets can establish a foothold in the market. The TVs that go on sale today aren't much cheaper than other lower-end brands, but they are less expensive than models from the likes of Samsung and Sony. Having them run Roku's own OS might limit their reach. (Why would you buy it if you were already paying for Netflix?) Elsewhere in the industry, manufacturers like Vizio are doing away with the smart TV interface altogether and instead putting connected tablets at the heart of the viewing experience.