Multifunctional Mini Level BoxON/OFF is Power switch, with the protractor on, press the button for 3 sec, to power off. UNIT key to switch degree or percentage. CALto switch Absolute/Relative Mode which press CALto enter relative mode,then hold CAL for 4s to return to Absolute mode. HOLD bottom can save the value, With hold function, you wont miss an important reading again. It helps your work more easier. .Pleasing DesignDigital Angle Gauge come with three magnets on the base, easily attaches to any objects made of steel. The Horizontal Angle Meter has Large LCD screen for horizontal quick reading. When the product is inverted, the number is automatically reversed. When your battery gets low, you will see the low battery warning on the screen. Automatically turn off after 3 minutes of no operation, helps to preserve the long battery life. .Zinc Alloy Shell ProtractorUnlike others plastic shell, our bevel angle gauge uses zinc alloy shell with good heat dissipation, waterproof, moistureproof and fine outline. CR2032 battery box using fire retardant material, the use of PBT plastic case, the use of new environmentally friendly materials, product temperature and environmental protection. Removable battery structures makes users convenient to replace batteries. Simply open the battery box and change it simply .Storable PortableMagnetic Protractor is a portable and lightweight tool for your measurement work so that you can bring it everywhere. Youll receive the digital level with a protective Pouch with a belt loop. Its especially useful for completing work on a ladder, roof, or other precarious positions without worrying about it get damaged. Use the stylish pouch to protect your Magnetic Protractor when its not in use. .Wide ApplicationWith Accuracy of0.1 at 0 and 90, 0.2 at other angles, and Resolution: 0.1, Digital Angle Finder Tool makes your woodworking, carpentry, construction and other works much easier. It is especially for measure checking fit angles, Installing shelves and cabinets, picture frames, measuring sloping roof angles, fitting windows and doors and much more .