Block Key Fob RFID Signal: Prevent unwanted signal communications and signal amplification attacks to your keyless entry system.

• Protect your key fob from duplication and auto "relay hack"; Easy to carry out with Keyring hook and minisized

• Comes with Two layers of high-shielding fabric on all sides with a protective ballistic nylon water-resistant outer shell

• Block Car key FOB Signal: Keep your car's security system from getting hacked

• Compatible Size: 12.8cm(5inch)x8.3cm(3.3inch); Fits for Car key FOB, Driver License and More

Warm Reminder:

• Do Not Bleach/Dry Clean/Warm Iron/Hand Washing Excessively, or it will destroy the nano layer and affect the effect of use

• The outer layer is just radiation,The inner layer is the shielding signal

• Signal Shielding bag must be closed, or it will affect the effect of use