... Audio Music Source from SD memory card or USB flashdriveNew portable aluminium vibration film loudspeaker allows the minimum noise & sound ... Battery capacity :900mAhOutput : RMB 10W (5W + 5W) THD = 10%Frequency response : 150Hz - 20KHz versatile connection to CD, DVD, MP3, MP4 ... computer,ipod, PSP, and any common music players HM-801 Portable Multimedia 2.1 Speaker System, with Remote Control, SD/ ...