WDLS become hot when i used 2 hour

WD Legacy Products WD TV Live Streaming
2

You could use a Laptop Cooler Pad

http://en.wikipedia.org/wiki/Laptop_cooler

or go to extremes (as user FlexTech did … “fan mod”)

(pictures at bottom of page)

http://community.wd.com/t5/WD-TV-Live-SMP-Discussions/WD-Live-TV-SMP-Very-hot-on-standby/td-p/457260