Bubble leveling tool is perfect to see whether a surface is horizontal and vertical. The bubble leveling tool set in motion by the accelerometer sensor or adjust axis itself the x and y, if you press the desired calibration buttons. Air bubbles turn red and a funny sound is played when the bubble is in the middle. You can issue this sound and change other settings or reset your saved calibration. Design your water balance and background color to your favorite colors. Tap several times to the desired color selection to save your settings. So each picture hangs horizontally and your furniture to be upright with your own bubble scale tool! The perfect bubble tool to plumb objects, whether at home or in the building site!