Hey everyone. I stumbled upon this product (Keyless Protector).

Looks like it's a chip that you mount to the key fob battery cell and activates when you tap the fob twice to give power to the key fob. Wondering if anyone from the EU has seen this and uses this to prevent key fob relay attacks. With car thefts on the rise and keyless entry systems being the most vulnerable, there has to be a easy and simple solution to prevent this instead of using a RFID/Faraday blocking bag which is very inconvenient. I know some manufacturers can make the keys go into sleep mode to cut off relay attacks.