and now my ears are rigging... great end, really tempted to dislike the video.<br><br>it's even worst than animal repellent device and old wifi router.<br><br>in school the class was amused to play such thing on their phone while i was freaking out about it and the teacher had no idea.<br>the worst when they had it in their pocket or bag for it muffled it in a way that i was not able to tell if they were doing it or if my ears where rigging.