Description:This is a professional speaker with superior sound quaility, composed of 1 main speaker and 2 side speakers. This speaker will let out a steady and undistorted bass sound. And you can adjust the volume, bass and treble sound effect by rotating the knobs, this speaker will create different atmosphere when playing different kinds of music. It may be a perfect companion for your cellphone, tablet, laptop, or desktop PC!Specifications:Color: Black, White (Optional)Material: ABSConnection: USB WiredAudio Cable Length: 1mAudio Port: 3.5mmUSB Cable Length: 1mPower Supply: DV 5V & USB 5VAdjusting Knob: Volume, Treble, BassOutput Power: 3WSize: Approx. 95 * 128 * 115 mm (Main Speaker), 62 * 72 * 63 mm (Side Speakers)Suitable for: Cellphone, tablet, laptop, PC or desktop computer.Package Weight: About 750gPackage List:1 * Main Speaker2 * Side Speakers1 * Manual(Other items in the pictures are not included.)