The correct posture is the basics of all your health.The wrong posture may cause not only a stiff neck or a lower back pain,but also a headache or various diseases of internal organs.This application gives an alarm when your back tilts more than a certain value, and helps you to keep the correct posture for your daily life.Usage:- Set "Sensitivity"of the left-right and the front-back respectively.- Press "START" and hold your device on somewhere on your upper body ( usually, the breast pocket seems to be reasonable ) and correct your posture within 5 seconds.- The posture is calibrated and the correction will start after 5 seconds.- If the current posture exceeds the "Sensitivity" value for 3 seconds, it gives the "alarm".- When the posture correction starts and the alarm is raised, "Sound" and "Vibration" is played, and they can be set to ON or OFF.- Note that it may be hard for you to notice "Vibration" when you put the device on your breast pocket. In that case, enable "Sound", which is like a ringing tone when the posture correction starts, and keyboard-typing-sound when the alarm is raised.