The Shield RFID Cardholder offers convenient contactless scanning and information of credit cards that features a Radio Frequency Identification chips, without sacrificing your security and privacy which will block incoming RFID signals from unauthorized scans or unwanted readers and protect valuable information stored on your credit card’s RFID chip. It can hold three cards at most. Sticks on the back side of a phone. The strap is perfect for you to hold it or a phone through a finger. –Undecorated Stock Available in 5 Working Days–