... music world. Mini, portable digital speaker for your convenience, connecting to your MP3,MP4, CD, DVD, iPod, iPhone, GPS, PSP, ... colors and power supply manners including battery, computer USB, adaptor DC-5V allow you to enjoy the music, for your option. ParametersUnit ... x H24mmPower supplied: USB cable or Built-in 3.7 lithium battery 3.7V/500mAh (optional)Audio Input: 3.5mm audio jack cable (included ...