If you're a bodybuilder or anyone w/ extra amounts of muscle, it wont work for shit. For example.... I'm a female bodybuilder and when I got it done I was 2.5 weeks out from my show, it measured my bodyfat to be 16% lol lol. When in reality I'm at like 5-6% right now. So its definitely way off, dont bother spending your money.
MY BUDY HAS THIS DEVICE, I THINK IT IS A PIECE OF SHIT. IT MEASURED HIM AT 22% MY CALIPERS MEASURED HIM AT 15%. USING A SEVEN SITE METHOD. I HOPE THIS HELPS YOU OUT.