MARVO S140&nbsp; Dual Sonic Speaker 2.0 Channel Computer Speakers (Silver) for Apple Macbook Pro , Air / Asus / Acer / Samsung / Dell/ Toshiba / HP / Sony Vaio and More Total RMS output: 3.0 watts, Total peak power: 6 watts Power supplied by USB port from desktop/notebook Selected 40x40 mm speakers for clear sound, Shine front panel Works great with any computer system using a standard 3.5mm audio plug Compatible with Win7, Vista, XP, Mac 10.0 or above