... Speaker. Just place the speaker on a hard surface to create a rich, enhanced sound backed up by soft vibrations ... used to furnish audio frequency for PC,music mobile phnone,Mp3,Mp4,CD,palm players and other portable fixtures.specificationsModel ... 7V 600mAh Li-ion batteryFrequency Presponse80Hz-18KHzFM RadioYesRemote controlYesAudio SourcePC,MP3,MP4,MD,CD,DVD player, Mobile phone,etcProduct weight0. ...