Unique and elegant style. Power saving and durability with solar power transmitter Receiver plug, European / American / British model optional. Range in open space: max. 200-300m 2 tunes of different styles,4-level Adjust volume, including mute mode Free pairing: one transmitter can be matched with several receivers. One receiver can also be matched with several transmitters Package size: 4.09x3.78x3.03 inch,Gross weight:0.4 lb