Wireless Whiteboard: Electronic Mentalism DeviceA perfectly innocent looking whiteboard. There is absolutely no visual clue that it communicates with a miniature receiver that sends you an indication the moment that a written item is erased. The volunteer writes up to 5 names, or countries, favorite restaurant, dishes etc. on the board. You can stand up to 50 meters away and even be blindfolded yet you miraculously know each item as it's erased. The board has 2 sides, so you can work simultaneously