Wireless RF Isolation Key Fob Security

Release Date: May 9, 2013

RF Pouch Isolates Wireless Car Entry / Starter Devices from Code Grabbers

Select-A-Shield™ RF isolation key fob bags permit secure access upon demand.

Canandaigua, NY USA: Select Fabricators’ Select-A-Shield RF shielded key fob pouches are designed to prevent wireless entry devices from sending or receiving signals as well as securing device information. These small, flexible “Faraday cage” bags are increasingly being used by rental car companies, replacement remote key manufacturers and car owners to isolate wireless remote keys from RF access. With the rise in theft reports of keyless entry vehicles, this small, unpretentious pouch is a convenient security deterrent against criminals trying to communicate with a wireless car starter or entry device.

Placing a wireless electronic key in a Select-A-Shield RF isolation pouch prevents the device from sending Radio Frequency (RF) signals to the vehicle’s electrical ignition and entry systems. Once the wireless device is blocked from sending signals, attackers cannot communicate with the device and gain access codes and entry to the vehicle. Reestablishing communications is simply accomplished by opening and removing the electronic entry device from the Select-A-Shield bag.

Select-A-Shield RF isolation bags are made of highly conductive metalized fabric which forms a “Faraday cage”.

Field tests have shown 99.99% average signal attenuation.

Examples of current applications include

  • isolation of spare keys
  • rental companies can now able to allow remote access to vehicles
  • isolation of toll road passes when not in use or in transit from the manufacturer
  • shield credit/debit cards with RFID chips from code grabbers

The Select-A-Shield RF isolation key fob pouches are available in two different sizes to accommodate application requirements.

Select Fabricators’ Faraday cage key fob pouch specifications

Contact Select Fabricators


Ordering a Select-A-Shield Wireless RF Test Box can be as easy as a phone call.

Dial 1-888-599-6113 and enter extension 125 when prompted between the hours of 8:30am and 4:00 pm Eastern Time weekdays to connect with a customer service representative.


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