Defender Signal Blocker – Car Key Signal Blocker

Rated 5.00 out of 5 based on 2 customer ratings
(2 customer reviews)

£5.00 £4.10

  • Dual-purpose signal blocking faraday pouch.
  • Made from unique RPF™ material.
  • Secured By Design Police Preferred Specification.
  • High quality, double stitched design.
  • Protects proximity fobs from relay attacks.
  • Large enough for all modern smartphones OR multiple Key fobs.
  • Contains educational card insert.
  • Available in Black, Grey or Red.


Defender Signal Blocker Bag Car Key Signal Blocking bag. A secured by design police preferred specification car key signal blocker. The Defender Signal Blocker is an industry leading front line protection Faraday bag for your mobile devices and key less car fobs.

Defender Signal Blocker – Car Key signal jamming pouch with RPF. Available in Black, Grey and now Red. Now awarded Secured By Design meaning it has Police Preferred Specification.

Protect key-less car fobs from relay attacks with the Defender Signal Blocker. The Defender Signal Blocker protects key-less entry fobs from being scanned by tech-savvy car thieves. This is the ultimate defender Faraday bag for car keys and mobile phones.

What are Relay Attacks?

  • Most modern cars now use key-less ‘smart’ fobs, which allow access and ignition by proximity.
  • These fobs communicate with vehicles via radio waves, with a range of a few metres.
  • Car thieves are using specialist signal-boosting devices to amplify the proximity signal of a fob that is inside a property.
  • The device acts as an ‘extender’ to the fob’s signal, while an accomplice waits next to the car, ready to open the door.
  • The method is quick and silent, allowing access and ignition in less than 60 seconds.

How can they be stopped?

  • The market-leading Defender Signal Blocker provides faultless protection against this new method of car crime.
  • Lined with specialist RPF material that prevents a car fob’s signal from communicating with a vehicle.
  • As long as a fob is placed and sealed inside the pouch, it is inaccessible to criminal signal boosting devices.
  • Large enough to hold multiple fobs and highly durable. Ideal or keeping around the house and carrying on your person.

Defender Signal Blocker Features

  • High quality mobile phone and vehicle fob signal blocking pouch with unique RPF (TM) material. As seen on TV, including BBC News and Rip Off Britain!
  • Blocks proximity fob signals. calls, SMS, Wi-Fi, 4G, Bluetooth®, RFID, NFC – Blocks & Unblocks in just 5 seconds!
  • Discourages phone use while driving – no notifications, no distractions!
  • Protects key-less car fobs from Relay Attacks,
  • Protects contact less cards and passports.
  • Secured By Design Police accreditation.

Defender Signal Blocker, a mobile phone storage pouch lined with specialist RPF (TM) material. Look for the Defender brand name to buy with confidence! The best car key signal blocker on the market.

Defender Signal Blocker was originally designed for use as a mobile phone storage pouch lined with special RPF material. When sealed inside the pouch, a mobile phone cannot receive any calls or alerts, blocking the temptation for a driver to use. They are also the perfect size for storing car keys to prevent relay attacks.

Large enough to fit all phones or car keys, including is a handy insert card that provides information on the updated laws on phone use while driving.

Defender Signal Blocker Bag Usage.

Defender Signal Blocker, not just limited to use while driving; the signal blocker pouch can be successfully used in any situation that you don’t want your phone to go off. Be it at work or school, in the cinema, at a function, attending a sporting event, or even just to guarantee conversation in the pub!

Defender Signal Blocker use intelligent RPF blocking material also possesses the capability to block RFID signals transmitted by contact-less cards, modern passports and key-less car fobs, thwarting digitally savvy thieves and identity fraudsters.

The Best Car Key Signal Blocker – Secured by Design

The Defender signal blocker is simply the best car key signal blocker on the market.  We’ve tested others and found they don’t not last and “leak” after just a few weeks.  Buy the Defender Signal Blocker with confidence.

Defender Signal Blocker Bag Car Key Signal Blocking bag

Secured by design police preferred specification

Voted Auto Express Best Buy 2018! Shortlisted for In Car Product of the Year at the 2018 First Car Awards!  

As seen on BBC 1’s Rip Off Britain, BBC News, Auto Express and lots more. The UK’s no.1 selling Faraday key pouch.

The defender signal blocker, probably the best product on the market, also known under the following terms, defender faraday bag, car key signal blocking pouch, signal blocker pouch, defender Faraday pouch, RFID car key pouch, phone signal blocker pouch, the best best car key signal blocker or best faraday bags for car keys. There is only that secured by designs and UK police preferred specification.

Dispatched from UK, Shipped via Royal Mail.

Additional information

Weight.08 kg
Dimensions186 x 117 x 6 mm

Black, Grey, Red

2 reviews for Defender Signal Blocker – Car Key Signal Blocker

  1. Rated 5 out of 5

    fruitbat44 (verified owner)

    Great product that does what it says and a great person/ company to deal with

  2. Rated 5 out of 5

    eric.f (verified owner)

    It Does What it is designed to do

Only logged in customers who have purchased this product may leave a review.