Switch2Health

S2H Replay wristbands monitor physical activity, and the wearer can earn rewards such as a gift card from a major retailer up to an Xbox 360.
The bands come in three sizes and cost $19.95 each.
To read more about go to the website:
http://www.s2h.com/
To see a short video about it and more information go to:
http://www.dailygrommet.com/products/396-Switch2Health-S2H-Replay-activity-wristband-monitor