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●100% Brand New ●This Mini Sound Box suit to MP3,MP4,MD,CD,Notebook,PC,PDA,PSP, a mobile phone and other digital products with audio frequency output ●This Mini Speaker used for charging the equipment with USB power interface ●Rechargeable Speaker with Lithium ion batteries with electric circuit protecting function ●Can charge MP3,MP4,MD,CD,Notebook,PC,PDA,PSP, a mobile phone, digital camera and etc.in emergency through special USB power output wires ●Specifications: *Loudspeaker output:2W X 1W X1(d 31mm.28mm) *Sensitivity:82±3db *Loudspeaker impedance:8Ω±15% *Distortion:0.5% *Lithium ion battery output:3.6V *Lithium ion battery input:4.2V±0.05V *Dimension: 45mm(L)X53mm(W)X34mm(H) *Weight:55g(including batteries) ●Package Contents: *1×USB Cable *1×Portable Sound Box with audio plug