Specifications:USB supply power directly, easy connection.Large diameter full frequency vibration loudspeaker, deep bass, rich midrange and clear treble.Rear bass trumpet, bass thick, to bring you highquality bass.Power switch, easy to use.Work fine, edge fine polished, smooth processing.High magnetic speaker, give you a different listening experience.Can connect PC, laptop, mobile phone, MP3, MP4, DVD.Item Name: SpeakersMaterial: PlasticOutput Power: 3WConnection Type: 3.5mm Audio PlugPower Supply: USB/DC 5VDegree of Separation: >=40dBSignal to Noise Ratio: >=80dBFrequency: 25Hz~20kHzChannel: 2.1Features: Portable, Compact Size, SubwooferMain Speaker: 127mm x 117mm x 96mm/5.00" x 4.61" x 3.78" (Approx.)Sub Speaker: 96mm x 77mm x 61mm/3.78" x 3.03" x 2.40" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Main Speaker2 x Sub Speakers