For a list of all currently documented Ralink chipsets with specifications, see Ralink.
Connector: Male A
Form factor tags: dongle
Wi-Fi USB Adapter N900 WLA-6100
The USB ID for this device is probably 0df6:006e (USB\VID_0DF6&PID_006E).. it is identified in Sitecom's driver files as WiFi USB adapter N900.
This device is likely to be an Edimax EW-7733UnD.