The Duronic BS201 set of scales will let you save weight of up to 8 persons. For each person you can do a weight comparison based on your previous weight.If your weight is lower than your last weight, then the display will be green. Blue if no change and red if weight is more, this feature will easily let you know your progress in losing weight even if you don’t remember your last measurement.It has 4 High precision sensors to give you accurate reading all the time. However to get accurate reading - the Duronic bathroom scales must be used on flat hard surface, i.e. Tiles, wooden flooring and concrete.Auto switch on when weight detected with Auto shut down. 180KG capacity with 0.1kg graduation. Please do not use any scales on carpets as this will give you incorrect reading.Large LCD display size: 75 x 30mm to let you easily read the display. Uses 2 X AAA batteries, Measures in kg | lb | st units. 2 Years Warranty Included with all Duronic Bathroom scales.