Knowledge is power. Gain insider information about what’s going on with your body with the Withings Body Composition Wi-Fi Scale. This digital, wireless scale measures your body fat percentage, BMI and weight, and automatically synchronizes with your smartphone to give you a personal coach at your own disposal. With its sleek black and steel design, this sturdy scale can hold up to 396 pounds, and measures in graduations of 0.2 pounds. The four sensors provide accurate weight measurement for up to 8 users. Anytime a different user steps on the scale, it recognizes the change. Uses 4 1.5-volt AAA Alkaline batteries for up to one year without replacements.