... Suitable for mp3,mp4,mp5,pc,notebook 2.0 speaker1,3D sound effect 2,High quality Slim & Portable ... USB Speaker 3,Suitable for mp3,mp4,mp5,pc,notebook Fashionable ... desktop speaker , laptop speaker 1.2.0 speaker2.laptop speaker3. ... 300-800mA)Speaker unit: 2W*2Output power: 3W*2 4Ohms(1KHz 10% THD)Frequency responce: 120Hz-20KHz ...