The antenna
A relay device near the door can pick up a compatible fob's signal through some walls and windows.
Keyless entry · Relay theft
Relay attacks can extend a compatible key fob's signal toward a nearby vehicle. Put your keys in the pouch and close the flap to help block that signal.
How keyless cars get stolen
A relay device near the door can pick up a compatible fob's signal through some walls and windows.
The signal is extended toward the car, which can mistake it for the nearby key.
Some vulnerable vehicles can then unlock and start without a broken window or triggered alarm.
How the pouch works
Keys in hand, same as always.
Close the flap fully so the shielding surrounds the fob.
Try the car handle before relying on the pouch, and retest it regularly.
Field test · 10 seconds
A Faraday pouch can wear or be left partly open. If the vehicle still detects the key, reposition the fob and retest; stop using the pouch if it no longer blocks the signal.
See the pouch
| Option | Do nothing | Metal container | FobLocks pouch |
|---|---|---|---|
| Designed to block a fob signal | No | Not always | Yes — test regularly |
| Easy to carry | — | No | Yes |
| Works away from home | No | Usually not | Yes |
Protect the everyday key and the spare
A spare key can still be within range of a relay device. Choose the pack that covers the fobs in your household.
The FobLocks promise
Run the vehicle test as soon as your order arrives and follow the return policy if it does not meet your needs.
Choose your pack