The model PD300DHR features digital weight and height measurements for accurate calculation of body mass index. Detectos time-saving digital height rod displays patient height quickly on the weight display. Simply step onto the scale and touch one key to see weight and one key to automatically calculate BMI. The LCD display provides easy-to-view 1 inch (25 mm) high readouts at a comfortable height of 48 inch (122 cm). Built-in wheels for fast transport. Six AA batteries (not included) or optional AC power adapter. Capacity: 0-220 lb x 0.1 lb (0-100 kg x 50 g) 220-550 lb x 0.2 lb (100-250 kg x 100 g). Height rod increments: 0.1 in / 0.1 cm. OIML EC Class III model available.