... mini speaker Applicable to MP3, MP4, Laptop, PC, MID, Mobile phone, etc…all kinds of digital audio players.Specification: Appearance Material ... Response Unit Size: 20Hz-20KHz Power: BL-5C battery, USB charging and power supply Speaker Interface: 3.5mm headphone jack ... and desktop, mobile phone, MP3, MP4, MP5, apples, etc., can be easily connected to your computer's USB port for music, movies and ...