HOT NEWS UPDATE: OnePlus teased its Concept smartphone at CES 2020। The first concept phone that has been developed in collaboration with McLaren। The key feature of the OnePlus Concept One is claimed to be that it is the first smartphone to feature an electrochromic glass panel, which can turn transparent or opaque to reveal or hide the rear cameras। In this video Electrochromic glass, its use & future scope is explained।