in 2008, brother succeeded in developing a spectacle-type wearable rid prototype that's able to show svga resolution (800×600) with a 60 hz frame rate and weights only 350 g. on 21 july 2010, it announced the airscouter and exhibited the device at "brother world japan 2010" in tokyo on 15 september. on 24 august 2011, it announced the commercialization of the airscouter.