Motion Sensor Alarm will alert you when someone or something has moved your device by means of an audible alarm. With 3 different sensitivity levels there's one thats right for your environment. It also has a calibration feature by pressing the set button and a reset button to return the calibration back to the devices native settings. With the different sensitivity levels all 3 axis X,Y,and Z are monitored. Hit the GO BLACK button to turn the screen black then tap the screen anywhere to turn it back. This can also help with leveling items.