Arduino Webserver with Temperature Monitor / Control

I want know whether Arduino Nano Clone is a USB Microcontroller or not? .Because I found a product in website named http://iteadstudio.com and the product name is Arduino Nano USB Microcontroller v3 (Clone version) .As you mentioned in your description the these words "Arduino" ,"Nano" and "Clone" words are containing in the product name Arduino Nano USB Microcontroller v3 (Clone version). If you mentioned the same product can you please tell me the prize you bought that part and from where you bought it. So I can compare it with the prizes in markets and buy the cheapest one

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