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Defender Signal Blocker with RPF™ & Police Preferred Specification - Vehicle Fob & Phone Protection Pouch

(18 reviews)
11.70 (cm)
18.60 (cm)
0.60 (cm)
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Product Details

Secured By Design Police Preferred Specification!

Voted Auto Express Best Buy 2018 & Best Buy in 2019 Mini Test!

Shortlisted for In Car Product of the Year at the 2018 & 2019 First Car Awards!  

As seen on BBC One's Rip Off Britain, BBC News, Auto Express and many more... The UK's no.1!

The Defender Signal Blocker is a high quality, dual-purpose vehicle fob and mobile phone storage pouch that is lined with specialist RPF™ material.

Since launching in April 2017, the Defender Signal Blocker has become the best-selling 'faraday bag' available, winning awards for it's exceptional quality and performance, as well as achieving the coveted Secured By Design Police Preferred Specification. 

The dual purpose nature of the Signal Blocker sees it combat two of the biggest security and safety issues of the day: relay attacks on vehicle fobs and distracted driving caused by mobile phone use. 

When sealed inside the pouch, proximity fobs are fully protected from tech-savvy car thieves, ensuring your vehicle cannot be stolen in this manner. 

Similarly, a sealed mobile phone cannot receive any calls or notifications, leaving a driver free to focus on road, free of distractions. Once removed, all missed alerts pull through to the phone within 5 seconds.

Beware of imitations! The Defender Signal Blocker is the only blocking pouch to feature industry-leading RPF™ material. 


  • 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
  • Blocks all phone signals and notifications to discourage distracted driving
  • Also blocks RFID, GPS, NFC, EMF
  • Large enough for all modern smartphones OR multiple fobs
  • Contains educational card insert
  • Available in Black, Grey or Red 

Also available in a Mini version.

Watch the VIDEO below!

18 Reviews Hide Reviews Show Reviews

  • 4
    Defender signal Blocker pouch

    Posted by Rachel on 24th Aug 2021

    After being the victim of a cyber attack, I needed something that would block signals from my hacked phone until I could get it professionally wiped, and to protect my new phone - these pouches are awesome as they stop everything, not just Bluetooth and NFC. I have bought several; my only slight gripe is that my S21 Plus with a protective case only just fits inside and it's a bit of a squeeze, so they could be very slightly larger. Otherwise, top marks!

  • 5
    Defender Signal Blocker

    Posted by Philip Baker on 9th Aug 2021

    Very quick delivery and the product does exactly what it's supposed to do. It's very efficent even up to the car there's no signal. Highly recommended

  • 5

    Posted by Paul Gillespie on 9th Jul 2021

    Brilliant value and it works,gave to family as a gift

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