multimedia speaker 1)Very Portable loudspeaker 2)Nice Design sound box 3)Best Quality subwoofer 4)Fast Delivery 2.0 speaker multimedia speakerloudspeakersound box SpecificationSpeaker:4ohm,dimeter:40mmOutput Power:2W*2Battery Voltage:3.7VAmp Frequency Range:180Hz~20KHzBattery Capacity: 400mAh S/N: ≥80db Dimension: 60mm(D)*55mm(H) (Single) Selling Point*Connect to your MP3, MP4, Laptop, PC, MD, ...