... convenience, connecting to your MP3,MP4, CD, DVD, GPS, PSP, mobile phone, notebook computer, Hi-fi speaker, U-disk and TF ... +3W) THD=10%l Frequency response: 150-18000HZ(±3Db)l Signal and noise ratio of power amplifier: ≥80Dbl Loud speaker 1 ... if it is so. More photos: mini portable speakers for mobile phones