Defender Signal Blocker Mini – New Version


  • Car Key Signal Blocking Bag / blocker Pouch
  • Made from unique RPF™ material.
  • High Quality, Double Stitched Design.
  • Key loop to attach your car key.
  • Protects relay attacks.

In stock (can be backordered)

Defender Signal Blocker Mini OT01238
Defender Signal Blocker Mini - New Version £4.49
  • Order in stock products before 12.15pm for same working day dispatch.
  • All Items ship from our UK warehouse.

The Defender Signal Blocker Mini is a brand new version of the ever popular full size Defender Signal Blocker. The new Defender Signal Blocker Mini is a smaller version designed just for a single car key. The ultimate cost effective car key signal blocking / car key signal jamming device.

This is new version of the Defender signal Blocker Mini version with Secured By Design approval. Secured By Design means it is UK Police Approved Specification and tested to ensure it conforms to a high standard.

Defender Signal Blocker Mini is a high quality and possibly the best car key signal blocker also know as a car key jammer. An industry leading front line protection Faraday bag for your keyless entry car key fobs. EV Accessories is an Official Stockist of the Defender Signal Blocker and Defender Signal Blocker Mini.

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

The Defender Signal Blocker Mini – Black OT01238.

How To Use Instructions.

  1. Place your key fob inside the pouch.
  2. Close and fully seal the Velcro flap, ensuring there are NO GAPS.
  3. Within 5-10 seconds all signals will be blocked.
  4. Remove your fob and all signals will return within 5 seconds.


The pouch can accommodate the largest Key less entry type car key.

Approximate Internal dimensions are:-

  • 120 mm length
  • 80 mm width
  • 20 mm deep

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 Mini 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.

Car Key Signal Blocking Pouch Features.

Authorised Stockist GOLD
EV Accessories is a Gold Level Authorised Stockist of Defender Signal Blocker Products.
  • High quality mobile phone and vehicle fob signal blocking pouch with unique RPF (TM) material.
  • Blocks proximity fob signals.
  • Blocks & Unblocks in just 5-10 seconds!
  • Protects key-less car fobs from Relay Attacks,
  • Use the Attached loop to secure Key to the pouch.
  • Secured By Design Approval.

A car key storage pouch lined with specialist RPF (TM) material. Look for the Defender brand name to buy with confidence! The best signal blocking bag on the market. Large enough for a single car key.

Defender Signal Blocker Mini – Car Key Signal Blocking Bag.

The new mini version of the Defender Signal Blocker is designed to hold one car key, and comes with a key ring loop inside for your car key, and a loop and the back for attaching to a bunch of keys. EV Accessories recommends keeping the mini signal blocker in loose pockets, tight pockets may increase the risk of damaging the RPF material and thus rendering the Signal Blocker useless.


Always test your signal blocker weekly to ensue that it is still operating perfectly.

The Best Car Key Signal Blocking Bags

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

Dispatched from UK, Shipped via Royal Mail.

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Additional information

Weight .030 kg
Dimensions 125 × 80 × 5 mm


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