The CA-2016 desktop 2-piece system comes in a compact and stylish design with convenient desktop control. The USB powered amplifier draws the power through a USB cable/plug. No batteries or AC power source are required. The stereo speaker system is magnetically shielded, has a LED power indicator, a cloth grill, a volume control and a headphone output jack. The CA-2016 features 1.5" x 3" high efficiency drivers and delivers 3 watts power output