This is a really cool product! It's very easy to use--just press a button to turn it on, then clip it onto the strap of your child's schoolbag (or your luggage). Hold the balanzza and lift the item off the ground. In a few seconds it will beep and display the weight of the item.
My 12-year-old daughter's schoolbag weighed 12.9 lb., more than 10% of her body weight. It should be interesting to see what my high-school-age son is hauling around each day.
I weighed my purse, too, and was surprised that it weighed 4.4 lb.

Maybe I should lighten the load...
This item is small but very sturdy and well-made. The package says you can lift a 100-lb suitcase with it; but I don't think I could lift a suitcase that weighed that much!
This is handy if you travel a lot or if you're concerned about the amount of weight your children carry each day in their schoolbags!