Seven-color Bluetooth AUX-in FM radio with USB drive port and micro SD card slot Stereo sound quality with pulsating LED lights. Power output (rms): 12W Speaker unit: 3-inch (6-watt) subwoofer 2 x 2 satellite (3W x 2) Response to frequency: 45 Hz to 18 kHz Power Source: 5V USB-Powered Categories: Speakers, Accessories & Supplies