Features of 3d glassesr it is a great supplement and extending device of the network set top box and bring you wonderful experience of watching movies and playing gamesr materials uses abs and 42mm aspherical optical resin lens material without stimulation plastic sheet environmentalr as your private 3d theater it offers you super 3d picture effect and wonderful immersive feeling and protect your privacyr effectively prevent visual fatigue and dizzy even after a long time use with the re