Detachable tray:baby can lie on the tray when weight is less than 20kgs. Standing platform tray: when the weight is more than 20kgs, the baby can stand on the scale. Material: Molded ABS. LCD digitial height: 24mm. Capacity: 50 kg/110 lb. Division: 10g/0.02 lb. Sensor system:4 load cell,more precise. Handy,reliable and easy to use. Battery:2xAA batteries (included). Energy saving: auto-on/auto-off. Overload indication. Low power indication.