Some people can make business cards that stand out and show off their skills. Take for example, that one engineer who created a card that lights up and that programmer who designed one that can play Tetris. But what if you're a medical professional, specifically a cardiologist? A company called MobilECG has created a business card that's directly connected to your field: it has a built-in ECG that actually works. According to its blog post, the device has sensors that measure "the real ECG signal between the users' hands," so long as their thumbs are touching the finger pads.