I'm thinking in buying this usb dongle but in some places they sell it as AWUS036H-V5 1000mW and others as AWUS036H 1000mW.

The question is: How to know you are buying the real 1000mW version and not the 500mW?

What are the physical diferences in the dongle? What are the differences in the boxes?

Also, do you know a cheap to place to order if you live in europe?

Thank you in advance