可以通过ＵＳＢ充电，也可以装入干电池供电，适用于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

Max Sound Pressure Level: 90dB