vibration speaker, speaker 1.Power:15W 2.Speak size:3"x2+ ... speaker, portable speaker,Speaker System, Active Speaker,Professional Speaker,bluetooth speaker,wireless speaker,vibration speaker,ipod speaker, iphone speaker,speaker stand,moblie ... quality of Bass. Item NO: YM-AV005 2.1 CH vibration speakerMaterial: WoodenPower: 15W Speakers Unit: 3"Midrangex2PC+4"Impedance:4 ...