Double Layer Signal Blocking Faraday Bags protect your belongings from EMF, RFID and other hacker signals, keeping them safe and unbreakable, preventing break-ins and keyless ignition theft. Made from premium black leather with the same signal-blocking technology as our Faraday cases, the keychain protection pouch can be counted on to keep your device safe with a stylish aesthetic wherever you go Measuring about 11*6*2.5cm, this handy Faraday bag for keychains is the perfect size to protect your keys, integrated access cards or other small electronic devices such as garage door openers or smart watches Clip it to your belt, or put it in your purse, this keychain blocker in smooth leather is easy to carry and offers sophisticated style. Looking cool, calm and safe when traveling