This certainly works well and blocks the signal from the key completely
I'm very pleased with the Faraday box and key pouch from key protect. They look and feel like quality items. I tried approaching the car with the key in the pouch and clearly it blocked the signal completely. On removing the key from the pouch the car unlocked almost immediately.
Would 100% recommend
Excellent does what it says on the tin. Would recommend.
KeyProtectPro® Premium Faraday Key Protection Box in Black
I have 2 car keys in new Faraday bags and the box takes both keys easily along with house keys. My old Faraday bags failed after 18 months. Just wear and tear so this feels like a good solution.