Men, women and children: This posture corrector for women/men/children can be adjusted to fit the weight range between 15 kg and 95 kg, suitable for men, women and children. As long as you correct hunchback and posture problems, you only need to maintainan upright posture with the help of a back posture corrector to experience a healthy body shape and visual protection! Smart posture reminder: If the back bow exceeds 25 degrees, the smart reminder will automatically sense and immediately activate the vibration; when your shoulder is bent forward and the tension is abnormal, the sensor will also vibrate immediately. Vibrationreminder, scientific correction,posture corrector flexibly protects and helps children grow. Counting function and comfort: Our posture corrector has a counting function, which displays the bad posture of a day on the LED display, which is very convenient for you or your child to progress. At the same time, you can press and hold for 5 secondsto reset the data. In addition, it is equipped with two highly elastic shoulder straps and adjustable non-slip buckles. You can adjust the shoulder straps to an appropriate length without rubbing your shoulders. Healthy and correct posture & easy to use: Based on the human body structure design, our lazy detector helps you develop a straight back, stretch the chest, improve hunchback, prevent back arching, relieve neck pain, shoulders, upper back, and protectYour eyesight, change the bad habit of laziness. In addition, it also provides comfortable training for your child, and is easy to personally wear or adjust. Standby time: This posture trainer uses a 400mAh polymer lithium battery, which can be used for about 15 days after charging for 1.5 hours. It can be easily charged by simply connecting the USB cable. The switch has a battery logo, flashing means lowpower consumption, and constant light means fully charged/normal working. If you cant turn on the reminder, please charge it for 10 minutes first.