SECURITY - Protects your RFID enabled cards, passport, driving license, etc from RFID skimming (electronic pickpocketing). TECHNOLOGY - Uses sophisticated electromagnetic jamming technology frequently used in military applications. CONVENIENCE - You no longer need to wrap your credit card in foil. Just keep VAULTCARD together with your cards in your wallet to ensure RFID security. NO BATTERY - VAULTCARD lasts forever. The card has an extremely efficient energy harnessing technology which allows it to be powered by energy from RFID scanner. AUTO-ADJUST POWER - VAULTCARD automatically adjust power of its jamming signal to ensure your RFID enabled cards, passport etc remain protected even against very powerful RFID skimming systems.