... aluminium vibration film loudspeaker allows the minimum noise & sound distortion, keeps high sound fidelityRemote controller included for remote access controlLithium Battery capacity ... - 20KHz versatile connection to CD, DVD, MP3, MP4, mobile phone, notebook computer,ipod, PSP, and any common music players HM-801 ... .1 Speaker System, with Remote Control, SD/MMC, Give Good Sound Output