ipTIME N100UA

Linux Driver : http://contents.iptime.co.kr/~contents/link/wlan/2009_0424_RT3070_Linux_STA_v2.1.0.0.tar.bz2

Mac Driver : http://contents.iptime.co.kr/~contents/link/wlan/RTUSBD2870(091002).dmg
Windows Driver : http://contents.iptime.co.kr/~contents/link/wlan/IS_AP_STA_RT2870(071509).zip

                         driver and utils for Corean: file download (25/01/2010)

Ralink download site : http://www.ralinktech.com/support.php?s=1

and specially download this : USB(RT2870/RT2770/RT307x/RT3572) -> here

Actually I hate this product.