... .Built-in rechargeable battery 5.Pocketsize portabilit 1. Computer Speaker,MP3 &MP4speake, USB speaker2.Digital USB 2.0 Speaker Systerm2.The ... , it is larruping. Product Specifications:AUDIO mini speaker suitable for IPOD,MP3 ,MP4 player, PC & MOBILE PHONE,MD,CD,PDA,PSP and ...