Product Description

What is rfid blocking card? and how's it work?

With the advent of more products that use RFID technology, many people have become concerned about their security. Consequently, there are quite a large number of products on the market that claim to block RFID. Let’s see how RFID blocking works.

Generally, RFID blocking cards, shields, and protectors work in several ways. They are either passive or active. Passive shields or protectors can absorb the RFID signal or deflect it. Active RFID shields or protectors use a microchip. They typically send out an interfering signal. It is effectively pretending to be another card causing a card clash issue in the reader. Or it drains the power from the transmitting signal required to power the chip in your card. If the chip can’t receive enough power to function it can’t transmit a reply.

assive shielding works in two ways, reflective loss (bounced radio frequency energy) and absorption loss (energy/power absorbed in the shield). Both types reduce the transmitting rf signal that would power the RFID chip.

Specification

item	13.56MHZ RFID Blocking card
Special Features	Waterproof / Weatherproof
Communication Interface	RFID
Customized support	Customized logo, Graphic customization
Place of Origin	China
Brand Name	huahai
Frequency	13.56Mhz
Protocol	ISO 14443A
material	PVC/ PET
Size	85.5mm*54mm
thickness	0.86mm
finish	glossy/matte/frosted
printing	offset printing or digital printing
blocking reading distance	2-6cm
Application	credit card protector/payment security
Item	rfid blocking card Structure

Advantage

Packing & Delivery