Item Type: Fat Calipers Material: ABS Built-in Battery: 1 x 150mAh Button Battery Battery Model: CR2032 Product Range: Approx. 0-50mm/0-2in Product Resolution: 0.01mm/0.01in Package List 1 x Fat Caliper 1 x Instruction Manual Delivered without battery. 1Made of ABS material, light and portable, palm sized, rounded corners, non slip design, comfortable grip. 2With the easy to use skin fat calipers, anyone can quickly learn very basic measurement procedures. 3Can accurately measure body fat level, better understand your fat level, take care of your body and health. 4Accurate body fat readings measure your body fat by measuring the thickness of your skinfold, not based on your weight or height. 5Easy to use, it is very suitable for fitness enthusiasts and personal trainers, health enthusiasts, to motivate yourself, use calipers to measure body fat.