4W*2 bass altavoz speaker bluetooth stereo Portable wireless Caixa de som mini music enceinte speakers box of sound support FMSpecification:Bluetooth:V3.0Frequency:50-20KHzDistortion:1%Max watt:4W *2Max voltage:DC-5VNet Weight:980gSignal noise Ratio(SNR):70dBWorking voltage:DC 3.7VPlayback time: Music time:3-6 hours Product size:220*68*74mm NOTE:color choice : black/ white， so please leave us a message of what color you want ，thinks