Specifications:
1. Measuring range: 2*180°
2. Accuracy: 0° and 90°: ±0.1°; others±0.2°
3. Resolution: 0.1°
4. Working temperature: 32~122°F; 0~50°C
5. Working humidity:
6. Power Supply: 1×1.5V AAA alkaline

【Note】
Please place it on a flat and smooth surface vertically.
Only the bottom is magnetic, the sides are not.
The angle gauge has been pre-calibrated at the factory; you can use it to measure directly.
If you want to measure relative angle, press "ZERO" can set current angle to 0°.
If not use for 3 minutes, it will shut down automatically.