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 ... sd card.2.Equipped with a 12v cigarette-plug power input.a good partner for car,motorcycle and ... outdoor journey and activities,such as bbq,picnic.3.Power-off memory available,continue your love songs after ...