Mini Digital Protractor - User-Friendly Operation : Turn on the protractor easily with a long press of the "ON/OFF" button for 3 seconds. Switch between degrees and percentages using the "UNIT" key. Toggle between absolute and relative modes with "CAL"; press and hold for 4 seconds to return to absolute mode. The "HOLD" function saves crucial measurements, ensuring you never miss an important reading again. - Strong Magnetic Base & Clear LCD Display : Our electronic level features three powerful magnets that attach effortlessly to any steel surface. The large LCD display provides instant visibility of level readings, and the numbers automatically flip when the device is reversed, enhancing usability. - Durable Zinc Alloy Case : Unlike typical plastic cases, our protractor is housed in a sturdy zinc alloy casing, offering superior heat dissipation, waterproof, and moisture-proof properties, while also presenting an attractive, professional appearance. - Portable and Convenient : This lightweight magnetic protractor is designed for easy transport, making it ideal for use on ladders, roofs, or other challenging work environments. Practical Applications : 1. Perfect for HVAC professionals measuring duct angles or slopes in tight spaces. 2. Ideal for carpenters and construction workers ensuring precise angle cuts for framing or shelving. 3. Useful for DIY enthusiasts undertaking home renovation projects requiring accurate measurements. This digital protractor combines functionality, durability, and portability, making it an essential tool for precision measuring tasks.