WHonor Faraday Pouch for Car Keys, Premium Keyless Entry Signal Blocker, Military-Grade Anti-Theft RFID Blocking Key Fob Protector for Car Security (2 Pack)

Perfect. Current car keys have a strong signal (rfid?) which maintains communication even a fair distance away, resulting in battery drain. Since using this, there have been no issues. The tell tale is the door handles open in response to the key approaching. Even next to the car, there is no pass through and the car doesn't respond. Since you should only use it for the key itself (it includes a warning regarding keeping housekeys inside etc) I recommend obtaining one just bigger than your key fob, to avoid carrying extra bulk. Good quality and the double pack means the unused spare is also covered.

Good quality, well made. Good price too for two pouches. Prevents signal as advertised.

Large case easily fits my car keys, seems to block signal, two cases a bonus.

Very good product. Does a brilliant job. Bought as a replacement for one that worn out after 3 years of using everyday

great product

Checked it out, works efficiently. Practically designed, fairly well made and competively priced.

Perfect, put car keys in these and walked to car, the car couldn't "see the key" would recommend

Worked well for 4months. Now doesn’t work and can unlock the car whilst the key is in the pouch