Count the calories you burn over 24 hours.
Currently not avail in NZ. Following is directly from bodybugg.com: the bodybugg calorie tracker works by keeping an accurate daily record of calories . burned making it easier to stay informed, make decisions and more effectively manage your weight.

What does it do?
The bodybugg system includes sleek wearable devices that are complemented by a user-friendly web based program.
Additional benefits & features
• Uses specialized sensors to track calories burned
• Manages calories consumed via a web based program (you will need to purchase separately)
• PC and Mac compatible
• Runs on a rechargeable battery

The renter will need to purchase a subscription from the website to load the calories burned data from the unit to the website (it's only about 5 dollars per month). I don't have the digital display yet, but it's been ordered. I tracked my calories over just about 14 days and then I used the calories I burn (vs what I eat) to lose weight. I'll also throw in a copy of my diet story (how I lost 36kg) for $5 extra