certe is a cheap product, but they are expected to minimally functioning properly. plastic are light, very light, one can measure the origin of just hit. Accuracy is very random and forget to use this mouse on all coatings. you need a mouse pad without reasons. if the mouse is lost on your screen. note that it may entertain the kids: he or cursor !!!!! short I regret my purchase and the next time I would go to buy a logitech darty or other product at the same price but reliable and most used in everyday life. Also the photos are flattering and it is normal for once in hand against ..... you'll understand: go your way