... .5W * 2 7. the system frequency response: 150 hz ~ 18 KHZ 8. power voltage: DC5V 500 ma/USB POWER Accessories Available: housing ... ,screen protector,usb data cable, memory card, card reader,holder and etc. Spare Parts Available: lcd/display, flex cable, trackball,trackpad,speaker,microphone ... help you to solve the quality problems. Airplane Design Mini Portable Speaker with Micro SD/USB