Car key signal blocker case faraday cage bag for RFID blocking of fobs and keyless entry systems, made from a plain black microfiber material with a size of 13.5cm by 9.5cm to protect electronic items like credit cards and phones.
Black microfiber faraday cage bag for RFID blocking and phone signal protection

In an era where digital security and personal space are increasingly valuable, this plain black faraday cage bag provides a straightforward, physical solution. Designed to shield your everyday electronic items from unwanted signal transmission, it acts as a portable barrier against RFID scanning, mobile phone radiation, and potential data theft. With its specific dimensions of 13.5cm by 9.5cm, it offers a compact and unisex design suitable for professionals, travellers, or anyone seeking to control their digital footprint and enjoy uninterrupted time without switching devices off.
Features and Construction

This section details the tangible aspects of the bag’s build and its core functionality, grounded in the provided specifications.
Material and Build
The bag is crafted from a plain black microfiber fabric. This material choice is central to its function, as the weave and composition are utilised to create a signal-blocking barrier, often referred to as a faraday cage. The construction is designed to be durable for regular use, and the unisex, plain pattern ensures it remains a discreet, practical accessory rather than a fashion statement.
Size and Practical Fit
With precise measurements of 13.5cm in length and 9.5cm in width, the bag is sized to accommodate a variety of common items. This compact form factor makes it easy to carry in a pocket, handbag, or briefcase. It is specifically suited to hold smartphones, standard bank cards, key fobs for keyless entry systems, and other small disk readers, as outlined in its scope of application.
Uses and Placement

Understanding the specific scenarios where this product adds value helps clarify its role in daily life and professional settings.
Event or Professional Use
For individuals in business, public relations, or management roles, the bag provides a way to create personal boundaries during meetings, family time, or leisure periods without causing offence. By placing a mobile phone inside, calls are blocked—resulting in a "call cannot be connected" message for the caller—while the phone itself remains on. This avoids the suspicion that can arise from deliberately switching a phone off, as mentioned in the source text.
Everyday Home Use
Beyond the office, the bag serves as a protective case for sensitive items at home or while travelling. It shields credit cards and ID cards from RFID skimming devices, protecting financial and personal information. The source text also highlights its use by pregnant women concerned about mobile phone radiation, as the bag prevents signal radiation from reaching the body, though specific radiation reduction percentages are not provided.
Benefits and Buying Value

The advantages of this product stem from its direct, source-supported functions and the practical problems it addresses.
Reuse and Low Maintenance
As a reusable accessory, the bag offers ongoing value. Its microfiber construction requires minimal upkeep; a simple wipe-down is sufficient for general cleaning. There are no complex charging mechanisms or electronic parts that can fail, making it a reliably passive form of protection every time an item is placed inside.
Why Choose This Product
This bag stands out for its singular focus on providing a verified signal-blocking function for a defined set of items. It addresses clear concerns over data security, personal privacy, and health considerations regarding radiation without making unsupported claims about material durability or premium quality. Its value lies in its specific, measurable size, stated material, and the practical scenarios it supports.
