James Park, cofounder of Fitbit, says that one of the main goals was to make the sensor so small that it will go unnoticed no matter what a person is wearing. The device can be put in a pocket, attached discretely to a bra, or slipped into a special wristband during sleep. It is meant to be worn 24-7, and each device can run for 10 days on a single battery charge...
At the conference, the gadget impressed a panel of judges that included Tim O'Reilly of O'Reilly Media. He says that Fitbit is tapping into an important field of wearable sensors and personal health monitoring: "It's completely on trend in terms of this idea of sensors driving the next generation of interesting applications."