Features:      Made of high quality ABS, it is solid, durable and good performance, long service life.      Creative wireless height ruler for measuring height in 3 seconds, high efficiency.      Wide measurement range from 5cm-2m can meets the measurement requirements of the whole family.      It will automatically turn off after 6 s no operation, energy saving and extend battery life.      LCD display for easily reading.      Buzzer operation tips, convenient to operate.      No need to install, just lay it flat on the wall, one switch operation.      Great ruler for recording the growth of your children.      Height ruler only, other accessories demo in the picture is not included            Specification:      Powered by: 3 x AAA battery(Not included)      Material: ABS      Working current: 30mA      Standby current: Less than 20uA      Function: Buzzer indicator, 1 button control      Display: LCD      Accuracy: 0.1cm      Measurement range: 5cm-2m      Size: app.5 x 7.7 x 22cm/1.97 x 3.03 x 8.66in      Color: Green      Quantity: 1 Pc            Note:      No retail package.      Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.      Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you            Package includes:      1 x Ultrasonic Height Measuring Ruler