Mobile,MP3, laptop Bag speaekr Mobile can put inside and carry outdoor to use Mobile,MP3, laptop Bag speaekrMoble can put inside and carry outdoor to usePortalble mini speaker for BIKEMaterial : polyester+EVA Product Size: 152*135*146Speaker size" 40MM*2 Resistance: 40 Ohm Frequency: 275Hz-20KHz S/N: >75dB Output Power" 2*2W Power supply: DV or 4 AAA Travel Bike Bag speaekr