Features: Scoliosis Testing Meter has an easy-to-read, large testing display. Providing measurement results between 0 and 30 degrees of deformity. Use the Testing Meter in conjunction with Forward Bend Test to measure the degree of rotatio n of a deformity of the back. The Meter works on Adults and Children. It measures 19x9cm/7.5x3.5inches. This portable Device is for ideal for recognizing a patient that may have scoliosis. Specifications: Material: Plastic Size: approx 19x9cm/7.5x3.5inch Color: Red/Purple How to use: Step 1: The subject remains standing with feet shoulder-width apart and hands sideways. Step 2: Hang your arms down and do a standing forward flexion- position, keeping your arms and The horizontal plane is vertical, keeping the arm perpendicular to the drain. Package Includes: 1x Scoliosis Meter note: Please allow 1-3cm 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.