Mini speaker for iPhone 4 1.suitable for the computer,PDA,, ... ,MP4,the U plate,the SD card. 2.Small size Mini speaker for iPhone 4 Model number:MA81231.This product is ... ,travel,sports,recreation. 3.Uses D kind of digital power amplifier chip,low powerloss,high efficiency. 4.Uses 40mm the neodymium ... contact us by e-mail or MSN for the inquiry. Mini speaker for iPhone 4