SAITECH IT RFID Blocking Cards 5 Pack Premium Contactless NFC Debit Credit Card Passport Protector Blocker Set for Men & Women, Smart Slim Design Perfectly fits in Wallet/Purse (Black)

To my knowledge they work extremely well

Brilliant item and price. New years gift to our family and friends to keep them cards safe

Very pleased with these RFID & NFC cards. I have given them to members of my family. I have tried them out and they work perfectly. Nothing is 100% safe but I do have confidence that these cards will give me some security. I obviously take as much care as possible to keep my credit and debit cards safe.

The RAFID & NFC Blocking Card states that it possesses the latest 13.56MHZ electronic blocking technology for the protection of bank cards from illegal scanning. It has not been tested by me at this time and I am unable to verify its effectiveness in a genuine situation to date. I may be able to verify its effectiveness at some future date. (I am pleased to say that it did not set off alarms when I visited a TESCO store in Portsmouth!)

Great quality,price and fast delivery

Great little card keeps my money secure

I read several of the 1 star reviews, it works if you use two cards and sandwich your credit card between them, I tested it on several different machines at restaurants and supermarkets and each time my payment would only work when I removed the credit card from between the 2 blocking cards. Very pleased with it.

They are looking good ,I had the 5 pack so I gave my family some to keep safe from scammers

These cards are perfect! I tested it at a cashier's checkout at a local Walgreens and at the grocery store's self checkout with the tap and pay. It works! Both times received an error message. Sometimes I carry crossbody bags or Dooney and Bourke wallets and neither has the RFID blocking. Just follow the instructions on how to place in your wallet and how to test it. I gave my husband one. I love backpacks too and when shopping they're worn on my back. These cards have added another layer of security! I've also placed one in my passport wallet for the next trip.

It does the Job as a shield against scanning devices.

I don't no if they work or not but have put them in my wallet. So if they work correctly i should be protected. I am happy with cards. The reason I given 4 out of ten

Fortunately, or unfortunately, so far I've never encountered a situation that test/verify the effectiveness of these cards, but I've read quite a number of good reviews from people with actual evidences, so I hope they are working fore real.

Best product. While traveling I used it, works very well. Good color, not fades easily. Build quality excellent. Easily fit in wallet. Recommended.