Lathem Proximity RFID Badges for Lathem PC600, FR700, CT70, CT72, CT74, PC50, PC60, Pack of 15 (RF-BADGE) RFID proximity technology Each card measures 3.375 x 2.125 inches Cards can be used with Lathem PC600, FR700, CT70, CT72, CT74, PC50, and PC60 systems Cards are waterproof Pack of 15 cards; Writable strip for employee name