TDSi cards are produced with the latest advanced antenna and assembly technology and are suitable for access control, time and attendance, membership cards, and identification purposes. Made from PVC and to ISO 7810 standards, the cards are very durable and resistant to cracking. TDSi cards offer a consistent read range and can be carried in a wallet or purse, or for use with a strap and clip as an ID badge.
Containing a CMOS integrated circuit for use in electronic Read Only RF transponders, they utilise passive technology, with no battery offering unlimited reading. The chip is powered by an external coil when placed in the vicinity of an appropriate card reader. Once this has happened the chip will transmit 64 bits of information contained in the memory array of the chip. Each card is printed with an 8-digit card number representing the unique identity of the card chip together with the TDSi logo.