I am not convinced the new advertised technology and the steep price of these two cards. This product is definitely better than the sleeves offered by other manufacturers. Those sleeves are very difficult to work with when your hands are wet or it’s cold outside or very warm. They are just not very user-friendly. But the scanner guard cards are simple to use. Simply placed them on the top and bottom of your credit cards, and hopefully a couple others in the middle if you have more than five cards. The product does work to protect against scanners who are trying to get the numbers on your credit cards. Five years ago this card package was half price for four items. Again, I don’t understand the technology and it wasn’t sufficiently explained on the website.

There are only two in this and I thought there were four, but that was probably my misinterpretation. I have no idea if it actually works, but I haven't had my identity stolen and I haven't had any unwanted charges that I didn't do yet. So, perhaps its working.

This product protects your cards if the are RFID cards NOT standard credit cards. The rfid cards have a chip in them to allow a quick tap. Most credit cards do not have an RFID CHIP in them. Being paranoid, I purchased these scanner guard cards before actually doing my homework. Hopefully, will never know if they actually work or not, thus the 3 star rating. Avoid the paranoid atmosphere when viewing SALES presentations of these cards, on such shows as QVC and others.