Clamshell Card is a RFID card which ich 3-4 times thicker than conventional cards. The dimesions are 85,5 x 54,5 x 1, mm. This makes the card very robust and durable. The clamshell card is made of resistant PVC and ABS and can operate in a temperature range between -20°C up to +70°C. The operating frequency is 125 KHz with a typical reading distance of 6 cm. The data on the card can be stored for up to 10 years. Of course we can personalize the card according to your demand.