Mens Slim RFID Blocking Front Pocket Card Wallet Card case Measures: 4 1/2" x 3 1/2" x 1/8". Ultra Slim Professional RFID Blocking Business Card Case / Wallet. Compact Design for Front and Back Pocket Wear 3 Credit Card Slots, 1 ID Window, 1 Pocket, and 1 Currency Pouch Prevent electronic pick pocketing, protect your identity RFID BLOCKING TESTED. Our wallets have been tested for 13.56 MHz Frequency in which our credit cards, debit cards, driver license and ID cards operate. PLEASE BE NOTED THAT the signal of some ID badge, access cards and hotel room cards which operates in 125 KHz, can not be blocked by this wallet.