【Adjustable stand angle】 TRAKK Smart posture corrector is equipped with a built-in motion chip smart sensor. It can be set in a variety of sitting-standing modes of 5°-50°. You can adjust angle by following step, in the off state, long press the left button, then press left/right button to increase/decrease. After adjustment, you just need to wait 5 scond, you can turn on and get the angle you set. Pls watch the video on product detail page, you can get how to set it up.