u/LaoPao333

This key card receiver is modular, meaning you can insert as many cards as you want. You can insert up to 10 ( and more ) cards into a single receiver, and it will accept them. If a card isn't registered in the system, it will be returned like the others, but it won't open the door or do what you set it to do.

Each registered cell has the ability to perform specific tasks. The key card receiver is quite fast and customizable. Each key card can perform its own task, as well as a common task like other cards. The receiver is very powerful and stable.

I also have another version of it that's MUCH SMALLER, but I lost it and I'm too lazy to build it. It's also limited to about 30 cards, and you can't assign a specific task to each card.