No 4 FuelBand

Nike released its first generation FuelBand in 2012 and the second generation FuelBand SE in 2013.

The FuelBand is a fitness wearable that monitors steps and calories and sends the information to users' iPhone apps. To motivate users to be more active, the FuelBand turns activity milestones into fuel points.

Both the first and second generation sell for $149.

Olympic athlete Shawn Johnson, left, and Nike Vice President of Digital Sport Stefan Olander speak during the NikeFuel Forum at Spring Studios in New York City on October 15, 2013. The screen behind them displays the second generation FuelBand SE. [Photo /CFP]