Features 1、USB-powered, energy-saving and environmentally-friendly, safe and reliable. 2、Superior Sound Quality: Enjoy your music through dual high-performance loudspeaker. Ensures enhanced clarity and fidelity. 3、Steady and undistorted bass sound effect with stereo sound surrounding. 4、Aesthetic and exquisite design. Lightweight and portable, convenient to carry. 5、Wide Compatibility: Desktop PC, laptop, DVD, TV, cellphone, tablet, PSP and other audio devices. Specification 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 outstanding bass sound with stereo sound surrounding. And you can adjust the volume by rotating the knob, this speaker will shows perfect interpretation of all kinds of music. It may be a perfect companion for your cellphone, tablet, laptop, or desktop PC! Features: 1. USB-powered, energy-saving and environmentally-friendly, safe and reliable. 2. Superior Sound Quality: Enjoy your music through high-performance loudspeaker. Ensures enhanced clarity and fidelity. 3. Steady and undistorted bass sound effect with stereo sound surrounding. 4. Aesthetic and exquisite design. Lightweight and portable, convenient to carry. 5. Wide Compatibility: Desktop PC, laptop, DVD, TV, cellphone, tablet, PSP and other audio devices. Specifications: Model: S-201 Material: ABS Connection: USB Wired Audio Cable Length: 1m Audio Port: AUX 3.5mm USB Cable Length: 1m Power Supply: DV 5V & USB 5V Volume Adjustment: Knob Output Power: 3W Separation: ≥35db SNR: ≥65db Size: Approx. 96 * 116 * 128 mm (Main Speaker), 60 * 60 * 70 mm (Side Speakers) Applications: Desktop PC, laptop, DVD, TV, cellphone, tablet, for PSP and other audio devices. Package Weight: About 550g Package List: 1 * Main Speaker 2 * Side Speakers 1 * Manual (Other items in the pictures are not included.)