Features: There are 2 sizes, 30/40cm, selecting based on your needs. Made of high quality aluminum alloy, lightweight & portable. Large bright green LED display provides better visibility, so you can easily read your measurements all day and night, even in the darkest spaces. Press "hold" button to enter absolute angle mode, the value will hold for easy to read. This inclinometer provide three different units of measurement selections: degrees , % grade, Metric/Inch. You can change the required units in your measurement. Can be used in woodworking, welding, fabrication, construction, machinery, home renovation, automobile etc. Package Includes: 1x Digital Level Specifications: Material: Aluminum Alloy Magnetic: yes 30cm length: 30cm/11.for 81 40cm length: 40cm/15.74in Type: 30/40cm(optional) 4x90 measuring Resolution: 0.05 Accuracy: vertical & horizontal 0.1,other angles 0.2 Waterproof : yes Dustproof: yes 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.