Clamshell card

The clamshell card is an RFID card widely utilized for access control and identification. They are a type of proximity card made from durable ABS and PVC materials, making them thicker than standard RFID cards, which often leads to their nickname “thick cards.”  Mostly operating at a frequency of 125 kHz, They are primarily used in access control systems for office buildings, large corporate campuses, schools, universities.