 Hi, I'm Carl Franzen with The Verge. We're here at CES 2014 going hands on with Reebok's new check light, a head impact indicator. Reebok's new check light, which was unveiled over the summer, contains a gyroscope for measuring rotational motion and an accelerometer for measuring linear motion. Combined, they activate a microprocessor on the other side of the check light, which displays a different light depending on the threshold of the impact. Green is a low impact, it's fine. You can keep playing whatever sport. Red, that means you need to get checked out. You should go see a doctor or go to the hospital. Yellow light would also indicate that you should probably have somebody take a look at your head to see if you were concussed or had some other sort of head trauma. Check light slides into a cap that you can wear underneath the helmet like this. There we go. Harder. All right. Awesome. Awesome. Awesome. Awesome. Awesome. Awesome.