... Outdoor,Portable Mp3/Mp4 mini speaker 2)with TF card rea mp3 speaker for mobile phone,iphone,ipad,all of digital products with TF ... suitable for PC,Notebook,DVD,Digital player ect.Portable and multimedia are your best choiceBuilt-in Lithium battery,works 6~12hours.Recharge ... :86dB.Impedance:4ohm.Power:DC 5V mp3 speaker for mobile phone,iphone,ipad,all of digital products with TF card MODEL NO:FS1101