The bathroom scale Kira operates without batteries thanks to its dynamo principle, making it particularly environmentally friendly. The technology behind this scale is called ‘Charge & Step-on’: simply press the display three times downward, and it’s sufficiently charged for one weighing process. Beautiful & accurate: The digital body scale features a weighing surface made of tempered safety glass and a sleek design with rounded corners. The bathroom scale weighs up to 150 kg in precise 100 g increments.