1、Aluminum Alloy: This angle ruler adopts high strength aluminum alloy ruler body, which is durable to use 2、LCD Screen: Use a high definition LCD screen with backlight function, the backlight will automatically light up during use, and the backlight will automatically turn off after 30 seconds of inactivity, can also be used normally in low light and dark environments. 3、Automatic Shutdown Function: This is an angle ruler with automatic shutdown function without response for 3 minutes 4、Wide Application: This angle ruler is mainly used for construction, woodworking, machining, home DIY, etc. 5、Basic Specifications: The angle ruler has a range of 0-225°, a resolution of 0.05°, and an accuracy of ±0.5°