1.Multifunction portable speaker 2.Apply to PC, mobile phone ,MP3, MP4 and other ... and other audio sourceSupports FM radio function Rated Power: 5W Speaker unit:80mm, 4ΩFrequence response: 150Hz-16KHzS/N Ratio: ≥80dbAmplifier ... field,sound quality even more pure graceful,sound excite people's mind 3,Built-in polymer lithium electricity,power life uninterrupted ...