RFID or Prox cards are in use almost everywhere today. They are used for opening doors, logging in to timeclocks, or opening parking lot gates. Your customer, if they have a large workforce, may use RFID cards or keyfobs. You can supply them and CredentialExpress can help. See our condensed line of RFID and Prox items above. If you have questions about how to get started selling your customer their RFID or Prox cards, reach out and we will be happy to assist.