This product is compatible with NFC Mifare 1k 13.56MHz IC&CPU card or key fob. The keypad is metal and backlit. It supports PINS or cards/tags. It has a huge memory that can be programmed to recognize 20,000 cards/tags. For detailed specifications and installation guide please refer to the following PDF: https://bissano.com.au/Ebay/Products/0013-Sebury-B6K-IC/B6PlusUserManual.pdf