Features: Ultrasound height measurement device with precise measurement and easy operation. Equipped with an LED digital display screen for clear and instant reading of results. Portable mini design, convenient and easy to store. Multiple measurement methods suitable for both adults and children, with a measurement range up to 200cm/6.56ft. After measurement, a buzzer sound indicates completion, helping track child growth easily. Specifications: Component: ABS + stainless steel Color: Refer to pictures for selection Size: Approx. 23cm/9.06 inches Power Supply: Type C Power: 3.7V 8W Measurement range: 30-200cm/11.8 inches-6.56ft Package Includes: 1 Pc 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 resolutions.