13.56MHZ Mifare Classic Blank White 1K Hotel Keycards (200 pk)

Cards are perfect for ID Badges.

I can confirm that these cards will indeed work with Brivo B series OSDP readers. They are 32 Bit CSN format with a pre-programmed serial number. However, the cards are completely blank on the outside, unlike other cards. You cannot identify a card, no way to know which card is which, unless you run them past a reader. They are just OK in my opinion.

These cards worked well for our Verkada system, much cheaper than the verkada branded cards

Some of them are bad and don't work but they are the cheapest so I keep buying them

Great product

My plan for these cards was to use them for fun activities at a summer camp that we're associated with. The camp often organizes themed activities such as space travel and spy adventures. My intention is to use these cards with associated Arduino projects that will translate into fun puzzle/scavenger activities for groups and individuals. I completed some of the electronics framework for this using an Arduino Uno equivalent microcontroller with an RC522 RFID module. Each card can store the standard 1 kB of data on board allowing for various parameters to reside on the card itself. This makes it perfect for the type of projects that I have in mind. The cards worked flawlessly. With an RFID module, there are just tons of uses for these cards even beyond what I am planning to use them for. Even more if you include a raspberry pi or micro PC. I am sure that I will be using some of these for home automation as well. Each card is very durable and robust. If you shine a bright light through you can see the chip in one corner and the antenna loop that runs around the circumference about 3/8” in from the edge. All os which is embedded safely in the plastic making it completely waterproof. The card comes completely blank, ready for whatever decoration or information you choose to apply. The best thing is that, with such a large pack, we will be able to provide individual cards for all the campers which they not only can use for the camp activities but then keep to use in their own adventures when they get home. I really like these cards and believe that they provide an excellent value.

The INNTECH 13.56MHZ MIFARE Classic 1K RFID Cards are quite sturdy and feel durable in hand. I initially hoped to write to these cards using my phone's NFC, but unfortunately, this tech isn't compatible with phones. That's a bit of a letdown, but the quality of the cards is still impressive. Despite the limitation, I'll repurpose them for another project. Overall, they're well-made, but be aware of the compatibility issues.

This is a large package of MIFARE Classic cards, perfect for use with certain hotel door lock systems or with DIY RFID readers like the RC522 or PN5180. They're perfect for storing a small amount of data (less than 1 kilobyte) or just reading the serial number to distinguish different cards from each other. They are not NFC cards - if you need an NTAG device for storing web links or emulating the tags in toys, these aren't what you need. There are a bunch of RFID technologies out there, so make sure MIFARE Classic is right before buying these. Packaged well, and a solid value for this quantity of cards.