... , bass and full, quality, more secure. 3. Application of digital drive technology, the world's advanced low-voltage, low power ... connected to MP3, MP4, IPOD, cell phone, DVD, CD and PC / MAC and other digital media player music and various audio files ... companion. 6.USB power supply, charge. Standard:, USB powered, charging lines. Availability: December 2009Product Dimensions: D (52MM) * H (64.5mm) ...