1.MIni Vibration speaker manufacturer 2.with battery, remote control 3.support TF card,FM radio 4.With a usb cable Listen, your table is singing !!!360degree surround sound!!!Vibration speaker is a magic audio frequency fixture. It is quite different from the traditional one which base on electro-magnetic coils.It makes any hard surface play euphonious musical notes,such as wood,glass,floor,metal ...