This set of mini speakers is specially designed for Desktop, Laptop, Notebook, Tablet PC. Its high-grade loudspeakers will bring you much wonderful music, a super companion for your outdoor activities and daily life. Features: Steady and undistorted bass sound effect with stereo sound surrounding, which brings you wonderful music. Wide Compatibility: Perfect for desktop, laptop, DVD, TV, smartphone, tablet, and other devices with 3.5mm audio port. USB-powered, energy-saving and environmentally-friendly, safe and reliable. Exquisite design. Lightweight and portable, convenient to carry. Enjoy your music through three high-performance loudspeakers. Specification: Model: D-202 Material: Plastic Output Power: 3W Power Supply: DC 5V & USB 5V Input Interface: USB Plug & 3.5mm Audio Plug Channel: 2.1 Seperation: 40dB SNR: 80dB Frequency Response Range: 25Hz-20KHz Color: Black USB Cable: approx. 1 m Audio Cable: approx. 1 m Main Speaker Size: approx. 12.8 * 11.6 * 9.6cm / 5.03 * 4.56 * 3.77 in Sub Speaker Size: approx. 7 * 6 * 6cm / 2.75 * 2.36 * 2.36 in Speakers Weight: approx. 582 g / 20.52 oz Package Size: approx. 23.3 * 15.6 * 12.6cm / 9.17 * 6.14 * 4.96 in Package Weight: approx. 686 g / 24.19 oz Package List: 1 * Set of Wired Speaker (3 speakers a set) 1 * User Manual (Chinese)