Logitech Z533 980-001056, Multimedia Speakers, Speaker 2.1, Power AC, Power Rating (RMS) 60 watts, Satellite 2 x 15 watts (into 8 ohms, @1 KHz, @10% THD), Subwoofer 30 watts (into 4 ohms, @100Hz, @10% THD), Power Adapter 100 - 240V (50/60Hz), Inputs Stereo RCA, 3.5 mm auxiliary inputs, Headphone jack 3.5 mm, Subwoofer 133 mm (5.25 in) front-firing dome driver. The Logitech Z533 Multimedia 2.1 Speaker System with Subwoofer was designed to deliver dynamic bass you can hear and feel. It can connect up to three compatible devices via 3.5mm and RCA inputs.