This GNC Wireless Body Fat Scale retails for $69.99, but right now – new on Groupon – it’s only $21.99!  The round glass scale measures more than just a person’s weight: it also analyzes body fat, water hydration, bone mass, muscle mass, and the number of times they’ve been to Mass. Users can look down to see their reading or glance at the removable wireless display, which can be mounted on the wall. The scale is equipped with a handy auto-zero function for accurate readings and saves energy with an automatic on/off function.