... for MP3,MP4,MP5 and notebook 3.For 3.5mm audio plug 4.RoHS, CE Mini hamburger Speaker, Mini Speaker for mobilephone ... be kept in pocket. 3.With 3.5mm audio plug, Applicable to many digital audio player like MP3, MP4, Laptop, PC, MD, Mobile phone ... , etc. 4.Using the world's advanced technology, low-voltage ...