# NFC Blocking Card: Your Ultimate Shield Against Digital Pickpocketing ## What is an NFC Blocking Card? An NFC blocking card is a specially designed card that protects your contactless payment cards, passports, and other RFID/NFC-enabled items from unauthorized scanning and digital theft. As someone who travels frequently for business, I've personally experienced the anxiety of carrying multiple contactless cards in crowded airports and urban centers. My background in cybersecurity made me particularly aware of the vulnerabilities, but it wasn't until I almost fell victim to a skimming attempt at a conference that I took proactive measures. ## How Does an NFC Blocker Work? A Technical Deep Dive My natural aptitude for understanding electromagnetic principles helped me grasp the technology quickly. An NFC blocking card works by creating a Faraday cage around your protected cards. It contains a conductive mesh or layer that absorbs and disperses radio frequency signals, preventing scanners from reading your card's data. ### TIANJUN NFC Blocking Card Technical Specifications For those interested in the engineering details, here are the technical parameters of our premium TIANJUN NFC blocking card: **Physical Dimensions:** - Standard Credit Card Size: 85.6mm × 54mm × 0.8mm - Weight: 5.2 grams - Material Composition: PET substrate with embedded copper-nickel alloy matrix **RFID/NFC Protection Specifications:** - Frequency Range Blocked: 13.56 MHz (ISO/IEC 14443 A/B, ISO 15693) - Attenuation Level: ≥ 35 dB - Effective Shielding Distance: Up to 3 cards stacked - Operating Temperature Range: -20°C to 60°C **Chip and Component Details:** - Shielding Layer: 0.1mm copper-nickel alloy matrix (Patent Code: TJCU-Ni-2023-7A) - Substrate: 0.7mm military-grade PET (Code: PET-MIL-5B) - Edge Sealing: Laser-welded perimeter to prevent signal leakage *Important Note: These technical parameters are reference data. For exact specifications for your specific use case, please contact our backend managemen