Leveling instrument with an angel sensor and LED diplay. The LED light under the bubble will change light when the angel is 45,90"or level

Leveling accuracy: 0.029=0.50mm/m
LED accuracy: 180°/ 90°：±0.1°； 45°：±0.2°
in the range of 180°t0.1°(45°0.2), green light on, with three beep

in Error range≥0.1°≤0.5°, Green light flashing

＞0.5°, red light on
Power supply: 3 x AAA