speakers subwoofer 1.strong power,embedded amplifier,soft voice 2.support USB/SD,MP3,use usb flash disk 3.1 year warranty 6 inch thin speakers subwooferModel number:MK600Subwoofers for cars’ detailed information:1)6 inch speaker with a tweeter make music sounded perspectively2)with trumpeter,support DVD,CD,Computer and other music player3)support USB,SD and MP3 play, if u like,fm radio function ...