USB-powered (5V) speakers plug directly into your computer for portable convenience. Turn the speakers on and adjust the volume using one simple control (located on the front of the speakers); volume control includes On/Standby. Simple plug-and-play setup (no drivers needed); can be used with headphones via the 3.5mm jack connector. Frequency range of 103 Hz - 20 KHz; 2.2 watts of total RMS power (1.1 watts per speaker). Measures 8.1 by 7.1 by 13.4 cm (LxWxH); weighs approximately 0.6 Kg. This product is intended for playing audio through a 3.5mm audio jack connector.