We have this projector ordered for our son who is a restless Einschläfer and always needs light. The projector conjures a calming mood and works perfectly. No jerking or the like read in other reviews. The power supply soon running after delivery unfortunately only about 10 seconds, then it was broken. But after a short email to the seller sent the us without returning just once a new one. Dedicated customer service! There is then a perfect score.