The Nike+ FuelBand was launched on Wednesday, February 29, and was completely sold out by Thursday, March 1.  According to Nike+, you can follow them on Twitter or get email notifications for the re-release of this sensation, which will be released sporadically in small batches. But what’s all the hype about? For $149, this smart little band is a sport trainer, personal cheerleader and home gym all in one.

The band is sleek and black, almost like a futuristic tracking device, and is intended for daily wear. There are 20 performance color LED lights., which show your daily goal progress. You are able to set your daily goal each day, and the closer you get to your goal the lights transition from red to green. The band is also equipped with 100 white LED lights, which track time, calories burned, steps taken and NikeFuel (the measure of activity) earned.  You are able to scroll through each of these categories with the push of a button.

Nike+ FuelBand targets no specific group of people, turning everyone, such as dancers, basketball players, runners and bike riders into athletes. “The key to doing more, is knowing more,” says the Nike+ FuelBand video, claiming that if you’re aware of your level of daily activity, you will be encouraged to do more.

As if you needed more awesome features, the Nike+ FuelBand is also water resistant, which allows you to wear the band in the shower (but not waterproof, so don’t go swimming with it on!). The battery lasts up to four days, and has a USB charging cable to recharge the battery and plug your band into your computer to sync.  You are also able to access your Nike+ FuelBand on your iPhone or on the internet, allowing you to always stay connected. The band also has airplane mode, so don’t worry about having to take it off for Spring Break trips. Another great feature is that the Nike+ FuelBand comes in three different sizes, small, medium and large, to fit comfortably around any size wrist.

Keep an eye out for the FuelBand to hit the markets again. Chances are, it’ll be gone quickly.