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In addition, equipped with Wi-Fi Direct remote control will have voice search capabilities, equipped with headphones and have a remote location. Roku's controller also provides an instant playback feature. 
It is reported that Roku4 is priced at $129.99, users can start pre-ordering today. Roku will begin shipping on October 21st.
Smoke sensor
Auto cleaning
Sensor touch control
Energy saving
Roku Officially Releases 4th Generation Smart TV Box Roku 4
According to foreign media reports, Roku Corporation today announced the official launch of the fourth-generation smart TV box Roku. Roku not only supports 4K ultra high definition video, but also the user interface design is upgraded to 1080P full HD resolution, and also equipped with a remote locator. Roku has also been improved in performance. Compared to Roku's 512MB RAM configuration, Roku has a 1.5GB RAM configuration. The processor part also changed from dual-core to quad-core ARM processor. In addition, Roku also supports .11ac MIMO Wi-Fi, optical audio output, Ethernet interface, HDMI digital audio and video output interface and microSD expansion card slot.