In order to build a rock hard body, you need to exercise often and eat right. To get those perfect 6-pack abs, you need to reduce your body fat. The Tanita SR-903 Subcutaneous Fat Analyzer is a handy device that uses 4 electrodes to measure the amount of fat in your body. It has a measurement range of 0.3 to 5cm.
This tool has a compact design, weighing only 91g. It has a gender selection button. You can find out more about it here.