This is the only wallet card that emits an invisible force field to protect you from identity-theft. Using patented signal-jamming technology, it provides a security zone that surrounds every card in your wallet and blocks RFID and NFC readers employed by identity-criminals to steal important information. The generated force field prevents unauthorized access of your identity regardless of the malefactor’s chip reader or the strength of their antenna. The credit card-sized device fits comfortably into a wallet, money clip, or passport holder, and features an LED that illuminates when the unit is actively blocking a signal. A built-in thin Lithium battery provides up to 18-24 months of power (depending on attempted hacks). 3 1/2" L x 2 1/4" W x 1/8" D. (8 oz.)