The belt is a usb cable. Plug it into your computer, press the button, and it will write your password as if you typed it at the keyboard.
You should be able to store a stronger password than one you can remember. The belt does not need batteries, does not send your password over the air, and does not need software installed on the computer where you want to type your password.
It's built using a Teensy 2.0 with a 3-d printed case (and belt buckle) and uses a usb cable as the belt itself.
This was done at the TechCrunch Disrupt NY 2015 hackathon with the help of Chris Gammell and Kenji Larsen. Thanks guys!