i heard there is one product, features of which r as follows : it has earphone, the base of the product has to keep in front of tv speakers and u can put the earphone. even if the sound of the TV /speaker is 1, the person putting the earphone can listen to them. the earphones r wireless. u can move to any room and can still listen what is playing on the TV. anyone know what the product is known as ? where to get it ? how much is the cost ?