The Bodybugg is like having a personal trainer strapped to your triceps. The 2.9-ounce gadget uses four sensors to calculate your energy expenditure with 92 percent accuracy&8212;on par with in-the-lab measurements. An accelerometer tracks your movement; two thermometers gauge body
temperature (one's for your core, the other for skin); and a
galvanic-skin-response sensor measures sweat. Upload the data to bodybugg.com, and the site will chart your daily calorie burn against your intake. $500
true video "All about Bodybugg"
I'm glad the price has come down drastically. You can pick them up now for under $300.00.
Fantastic product and it has been proven to be effective. Though, there are many of these on the market this one actually measures your core temperature and according to reports is accurate.