fitbit

At two inches high and a half-inch wide, Fitbit reminded me of the rectangular iPod Shuffle that clips onto clothing.

Along with its holster and sleeping wristband, Fitbit comes with a base station -- a small USB-connected stand for charging.

This kind of sensor is in the hit biometric device -- among early adopters at the moment -- the Fitbit.

I wanted to know more about these different sleep states, but Fitbit doesn't analyze that sort of thing.

Consumers now can buy basically hundred-dollar devices, like this little FitBit.

The Fitbit wirelessly sends the data to its Web site, fitbit. com, for storing these minute-by-minute details.

All of these goals can be adjusted from what Fitbit. com sets.

If you change data on Fitbit. com, like your weight, this transfers to the device so it's calibrating as accurately as possible.

Fitbits began shipping at the end of September and will continue shipping to customers who pre-ordered the devices.

Battery status can be checked through Fitbit. com.

But the Nike iPod and Zeo offer Web components that Fitbit currently lacks.

In January, Fitbit Inc. will start delivering new orders and Fitbits will appear in retail stores.

While sleeping, I wore a Velcro wristband that held the device in place.

Fitbit and Greengoose, two start-ups, are selling wireless accelerometers that can track a user's physical activity.

Unlike some other products, it attempts to track your body's activity while you're asleep and awake, rather than one or the other.

Nike and Fitbit track and provide insight into your exercise.

I've been using Fitbit almost nonstop for the past week.