Professional signal blocking box for home or office / work use Car key signal blocking / blocker box - The box will effectively shield all signals to prevent criminals from using key fob skimming tools to access your vehicle - Suitable for blocking car key signals, Bluetooth ...Professional signal blocking box for home or office / work use Car key signal blocking / blocker box - The box will effectively shield all signals to prevent criminals from using key fob skimming tools to access your vehicle - Suitable for blocking car key signals, Bluetooth signals, WIFI signals, GPS signals, GSM call signals, NFC and many more - Suitable for use on mainly car keys but also suitable for mobile phones and bank cards - Will hold 5 to 7 car keys including key rings and house keys - Dimensions of the box 14cm x 11cm x 7.5cm (L x D x H) Manufactured from High Density faraday fabric - Anti friction leather which is wearable and non slippery - Simple to use simply place the keys inside and close the box - Suitable for use for up to 3 years SPECIFICATIONS - Car Key Signal Blocking Box - Manufactured from High Density Faraday Fabric - Anti-friction leather - Metal buckle - Will hold up to 7 household keys - Total length – 14cm - Total depth – 11cm - Total height – 7.5cm - Colour - Black.