Features: Ultrasound height measurement device, precise measurement, easy operate, easy to use. Equipped with LED digital display screen, the measurement results are clear at a glance. Portable mini designing, convenient and easy to store. Multiple measurement methods are available for both adults and children, with measurement of up to 200cm/6.56ft. After the measurement is completed, there will be a buzzing sound to easily record the child's growth. Specifications: Component: ABS+stainless steel Color: refer pictures to selection please Size: approx. 23cm/9.06inch Power Supply: Type C Power: 3.7V 8W Measurement range: 30-200cm/11.8inch-6.56ft Package Includes: 1Pc Children's Electronic Height Ruler note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.