It is always great to find a product that comes with everything you need all in one.The 5758 body fat monitor by Taylor provides all the tools needed to stay on top of your fitness goals. This scale estimates your body fat and boby water ,muscle and bone mass percentages. the cal-max system calculates how many calories you need a day to maintain your current weight,take in less calories then this,you lose weight.This scale acts as a normal weight scale as well. The 15' tempered glass platform leaves you plenty of foot room for added comfort.The scale weighs up to an impressive 440 pounds in .2 pound increments ,also measures in kgs and grams. the large 6 inch x 1.2 inch readout is easy to see and easy to read.The scale is powered by one lithium battery that we provide. T he 12 user memory helps everyone in the family or office monitor their progress.