When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I read a magazine test (standing in a grocery--I can't remember which mag) of them and they were very unreliable. The set that they tried had readings all over the place.
I don't remember the specifics--just the lesson. Not something you want to spend money on :smile: