Thank you, but that's the page which caused me to ask the question. It says:

"Just add the VYK Arwen for G8F to your cart at 40% discount and the system will automatically gift you -upon checkout- one of the following products by vyktohria that you don't already own!"

The item is gifted by the system automatically after check out and payment - that much I understand. What I'm asking is whether the gifted item is selected by the system, or whether we're presented with a choice of which item the system will gift after checkout and payment?