Medimama is committed to offering practical body fat caliper to everyone to learn his body fat percentage helping him watch the figure keep fit or track health condition. How does the fat caliper work?:After clinical researches conducted thousands of times the body fat measurement chart is derived recording almost all possible body fat percentages and correspondant health conditions according to different thickness of skinfold genders or ages. So do the measurement with tool and compare to the chart all is done! Product Advantages:1. Professional caliper measuring tool with scientific approach provide reliable result. 2. User-friendly fat measure clipper : easy to operate; double accurate scale; anti-skid tooth side handle.3. Compact size and portable design allow you to take the skinfold caliper along with you and feel free to use it at home or in the gym How to use this body fat caliper:1. Move the slide all the way to the right.2. Firmly grasp the skinfold with fingers.3. Place the measure jaws of the caliper over the skinfold press to the arrow line.4. Read and record the measurement to the nearest millimeter.5. Refer to the measurement chart to determine your body fat percentage.Where to apply the caliperSkinfold of abdomen thigh waist bicpes chest (for men) and underarm (for women) Please Note:1. All measurements should be carried out on the right side of your body.2. It is supposed to keep your skin dry and without applying any skin care product before measurement.3. Donât take measurements after physical activities or when you are overheated. The added fluid under the skin may increase skinfold thickness.4. For detailed directions and prompts please refer to our users instructions.