8-Piece RFID Blocking Cards Set - NFC Contactless Protection for Credit Cards, ID Cards & Passport - Prevent Digital Theft & Skimming - Ideal for Travel, Shopping & Daily Security (8pcs)

Specifications: Color: AS the Picture Show Size: 3.37 x 2.13 Inches ( 8.55 x 5.4 cm ) Package include: 8 x RFID Blocking Cards You don't need extra batteries and equipment, just place these shielded cards within 1.2 inches (3 cm )of your credit card when you pay to block the signal. Please do not put the shielded card near the heat source to avoid damaging the function. Tips: Due to manual measurement, please allow slight differences on size. There might have slight color differences due to different displays.