Shortened link
The link you followed has been shortened with is.gd. Shortened links can go anywhere on the Internet so you shouldn't continue if you got the link from a suspicious source e.g. junk email.
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http://www.amazon.com/gp/product/B004YVH6HG?psc=1&redirect=true&ref_=ox_sc_act_title_1&smid=A2PCDEJ7ZLTOHW
Tip: some QR readers fail to read mixed case URLs properly. We recommend using the lower case option or a lower case custom URL with QR codes.