The Walkeer could be powered by a little battery box, as well as USB powered. Pls see it in the attached pictures.
Walkeer
is designed as audio solution for iPod, mp3, CD player, laptop,etc.
The
detailed tech info as the following,
Dimensions:
(Width)150mm*(Hight)120mm
Thickness:
6mm(min);20mm(max)
Total
Weight: 170grams (80g per speaker)
Output:
1.2W+1.2W
Max
handling power:5W+5W
Frequency
Response: 150Hz---20KHz
Sentivity:83dB/1W/0.5m