OMRON HBF-400 Fat Loss MONITOR with Scale Type: Body Composition Monitor Features: Measures 3 Fitness Indicators: Body Fat Percentage, Body Mass Index(BMI), Body Weight 4 Person Profile with previous measurement results Easy on/off switch at the base Large LCD display 4AA batteries included Power Source: 4 AA batteries Operating Environment: 50°F to 104°F, 30% to 85% RH Storage Environment: -4°F to 140°F, 10% to 95% RH Dimensions: Approximately 12.25 (w) x 11.88 (d) x 2 .25 (h) Weight: Approximately 4.63 lbs. (including batteries)