1. USB speaker with only USB cable for power and audio 2. Aluminum alloy housing with stylish design 3. Sound effect: Stereo, Deep and Vigorous but Crystal, Sweet, Fine and Smooth, to challenge your hearing threshold, perfect speaker for your laptop. 4. With clip for clipping on laptop. 5. With rubber stand for standing by your notebook. Technic Specifications Dimensions: 205* 30* 25mm( L* W* H) Power Output: 3W ( 1.5W* 2) Impedance: 4 ohm R. Frequency: 90Hz-20kHz S/ N Ratio: > = 80dB Audio Input: USB Audio Power Supply: USB power 5V