- 2.0 speaker for computers and notebooks ,- Volume control for individual, continuous volume adjustment on the back of the casing ,- Additional protection thanks to metal grille ,- Power supply via external power supply unit - Connection: 3.5 mm Jack Plug ,- Audio system: 2.0 ,- Distortion (max.): 1.5 % ,- Speaker W x D x H: 7,5 x 9.5 x 15.8 cm ,- Weight: 895 g ,- Power Supply: External Power Supply ,- Frequency Range Speaker: 100 - 20000 Hz ,- Impedance: 4 Ω ,- Peak power: 8 W ,- Sine-Wave Power Output (Speaker): 1.8 W ,- Voltage: 5 V ,- Colour: Black ,- Recommended Use: PC 2 years legal warranty only