DIGITAL LEVEL 
Technical Parameter:
1. Large LCD. Back light for easy reading in dark place.
2. Beeper will sound at 0.  45.  90°.
3. Display always reads upright, no matter which way the unit is turned.
4. Manual ON/OFF, auto power off.
5. Degree and slope conversion.
6. Absolute/ relative measurement conversion.
7. Measure data holding.
8. Low power warning
9. Battery type: one 9v battery (included)