1. What is RFID shielded card
From the meaning of the word, it means shielding, shielding external devices from reading card information and blocking card reading signals. The shielding card currently used is mainly composed of PVC materials and shielding chips. From the outside, it is no different from the ID card and IC card we commonly use. It can not be seen that it is a card with black technology.
2. Operating principle
When you are in shopping malls, bars, nightclubs and other places, it is inevitable that some criminals will use some special devices to get close to you or read important card information on you from a long distance, such as bank cards, ID cards and other smart cards, resulting in your property losses and personal information exposure.
Shielded cards are specially used to protect the data security of high frequency smart cards such as bank cards, ID cards, city all-in-one cards and bus cards.
In appearance, the size of the shielded card is the same as that of an ordinary bank card. When you put your bank card, ID card and other smart cards together with this shielded card, the wireless signal of your smart card will be effectively shielded. No matter what equipment the criminals use, they cannot steal your card information to ensure safe carrying and prevent information leakage.
As long as the card is put in the wallet, the shielding chip will realize the radiation shielding function for all chips within the range.
Shielding card parameters
Blocking frequency HF: 13.56MHZ
Protection distance: 3~5CM (close to protection)
Product material: PVC/PET+antenna coil+chip
Chip model: special COB shielding chip
Product size: 85 * 54mm (customizable)
Product use: prevent bank card/certificate card and other cards from swiping
Use scenario: subway station, railway station, bus station, etc
Support diversified printing, thickness can be choice
3. Use of shielding ferrule
At the same time, there is a shielding ferrule with the same function. Put the card to be shielded into the ferrule to isolate the signal
In fact, this ferrule has another function, which is to prevent the chip from being burnt by the current generated by electromagnetic changes when the clamp with coil is close to a strong magnetic field.
Shielding card parameters
Printing: pattern can be customized
Size: 88 * 58mm (customizable)
Material: inner aluminum foil protective film, middle coated paper, outer film
Features: 1. Prevent strong static interference
2. Prevent damage of strong electromagnetic field
3. Prevent others from reading and stealing your personal information maliciously
4. Extend the effective service life of the smart card
