[High precision] Four different measuring units have a wide range of applications and meet different needs. [Auto Sleep] This digital inclinometer automatically turns off after 5 minutes of no operation to protect the battery. [Magnetic Base] The mini electronic spirit level has a strong magnetic base that attaches easily and firmly to the object measurement can be. [Powerful Function] Click the Return to Zero button to set the relative zero angle, then click the Hold button to keep the current reading on the screen. [Reminder] When the measurement plane is uneven or there is a large gap between the measurement plane and the bottom of the product, an error will occur when resetting. (The product is sold without batteries.) This product is a brand new innovative angle and height gauge, LCD display, easy to read. Lightweight, easy to carry and use. It is particularly convenient to measure various angles, the level and inclined plane angle of the miter saw, vehicle volume inspection and maintenance, etc.1. Screen resolution: 0.1 2. Precision error: +/-0.2 (0-90), the other precision error 0.3 3. Measuring range: 490, 3 lengths of 100-150-200mm 4. Power supply: 2 3V CR2032 button batteries (the product is sold without batteries) 5. The lower measuring surface is magnetic. Pictures are taken in kind, there will be color difference, details shall prevail in kind, please forgive me!