What can you do with one hand?

While braking with one hand using the Brake Director, you can use the other hand to gesture wildly at motorists, admire your bling bling, sip an espresso, make a call, and push the buttons on your power meter.

Joking aside, the Brake Director was invented to address the needs of riders with upper body limitations, like recovering from a broken collarbone. It works by activating both brakes with one lever.