... is available 5.ISO,CE Free Design Portable Speaker OEM MadeDescription:Features:√ This digital speaker can be deemed as perfect combination of ... you go√ Mini audio box with new concept integral stereo portable mobile music, connecting your MP3, MP4, CD, DVD, iPod, Phone, ... ) Operation instruction:• Battery: Built-in lithium battery, can play music and charge when use USB power• DC-5V: Direct current ...