wireless speaker, speaker 1.Power:50W 2.USB/SD card reader ... , Speaker Box, Loudspeaker, Sound Box, usb speaker,PA speaker, portable speaker,Speaker System, Active Speaker,Professional Speaker,bluetooth speaker,wireless speaker,vibration ... enhance quality of Bass. Item NO: YMA002 2.1 CH wireless speakerMaterial: WoodenPower: 50W Speakers Unit: 3"Midrangex2PC+4"Impedance:4 ...