Very good 3D glasses, and easily recharge the battery holds a charge to watch 2 or 3 movies at least. Very good 3D active glasses then, and very light. If you wear glasses, do not forget to remove the "nose support" (I do not know how this thing is called) and they are forgotten. I recommend instead the 3D glasses button batteries, cheaper course, but taking less on the nose. A good buy so often to watch movies in 3D.