DescriptionComfort Travel SKIMMINNG STOPPER is the same size as any credit cards. It uses the latest Electronic Blocking Technology to stop transmissions of personal information e.g. your name, date of birth, account number being read by a remote RFID device. Just simply place it in your wallet or purse and it can effectively block out unwanted radio signals.Features: Protect personal information from unauthorised access by a remote RFID device One card provides approx 2.5cm protection either side of the card Electronic blocking technology 13.56MHz SpecsProduct Code:9300622107042Size (cm)8.5 x 5.4