Photos: Fitbit a pocket-size personal trainer

The Fitbit is a new personal-fitness tracking device that can track how many steps you've taken, as well as how long you sleep each night.
Here it is on its docking station, which doubles as a wireless antenna. When users get within 15 feet of the docking station, the device begins to sync up your latest activity to the Fitbit Web site.

The Fitbit can be worn inside of your pocket, or slipped on top of it.

The Fitbit's design is almost symmetrical, except for one button which cycles through how many steps you've taken, how many calories you've burned, how far you've walked, and your current, overall fitness level.

The Fitbit packs an OLED display which sits underneath the outside of the device. It's bright and easy to read except in direct sunlight.

The Fitbit is small and slender, and contains a battery--which users can't remove--that lasts about 10 days between charges.

The rear of the device does not have a screen, but looks almost identical to the side that does.

The inside of the Fitbit is silver and contains contact points that let the base station recharge its internal battery.