Android usb tf card speakers 1.rechargeable battery 2.high quality 3.1 year ... warranty 4.RoHS, CE Android speaker, Android usb tf card speakers, active powered speakerTechnical parameterOutput power: 3W 4ΩFrequence response ... 3.5mm jack, PC, IPhone, IPod, notebook. 4.Memory cards: U disk, SD, TF card5.Warranty: 1 year Packing detailsInner gift box ...