- Active 2.0 speaker for computers and notebooks ,- Volume control for individual, continuous volume adjustment ,- Power is conveniently supplied via the USB connection - Connection: 3.5 mm Jack Plug ,- Audio system: 2.0 ,- Distortion (max.): 1.6 % ,- Speaker W x D x H: 7 x 7 x 7 cm ,- Weight: 390 g ,- Power Supply: USB 3.0 A Connection ,- Frequency Range Speaker: 120 - 20000 Hz ,- Impedance: 4 Ω ,- Power Output (RMS): 3 W ,- Voltage: 5 V ,- Colour: Black/Silver ,- Recommended Use: Notebook 2 years legal warranty only