The central switch on the back is easy to access and reasonably set, allowing adults to turn the device on without effort. Induction vibration reminder and angle sensor - If you hunch forward more than 25 degrees, the corrector vibrates immediately to remind you to straighten. - This feature helps promote better posture during use. Battery and calibration - One hour of charging provides up to 15 days of use. - The 400 mA battery offers large capacity, long battery life, and supports continuous calibration. Comfort and fit - Worn design adapts to the curve of the body. - Made of nylon material with elastic feet and comfortable shoulders. Use scenarios - At a desk for long work sessions to maintain proper posture and reduce neck and shoulder strain. - Reading or studying to keep an upright position without distraction. - Traveling or commuting to support posture and prevent fatigue during extended wear.