Easily measure adults and children at home, in the office, or at a clinic. Very easy to install; comes with a placement box to create an outline. Note: This unit only has metric measurements (centimeters) and does not measure in feet or inches. Installation instructions: 1. Place the stadiometer on the floor against the wall. 2. Pull the tape measure up far enough for the zero to line up exactly with the red stripe in the measurement display area. Then mark the site of the drill hole on the wall on the upper part of the attachment hole. 3. Attach the end of the tape measure to the wall using the screw supplied. 4. Push the stadiometer back together. Measuring with the Stadiometer: 1. The person to be measured stands under the stadiometer. 2. The measuring tongue is lowered onto the head. 3. Height appears in the measurement display area. Material: ABS + Metal Color: Black Range: 0200 cm (Metric Only Not Feet/Inches) Graduation: 1 mm Quantity: 1 Piece Package Contents: 1 x Stadiometer 2 x Screws Only the above package content is included; other products are not included. Note: Lighting and different displays may cause the color of the item in the picture to vary slightly from the real thing. The measurement allowed error is +/- 13 cm.