1、Real‑time monitoring of posture through smart sensors guides children to correct their posture autonomously and develop a good sitting posture. 2、Small size, easy to carry, suitable for home use, and easy for children to take to school. 3、Long‑lasting battery life, ultra‑low energy consumption, and battery life up to 15 days. 4、With super‑elastic and telescopic rope, it can be adjusted according to the size of your head. 5、There are two modes of voice mode and vibration mode, and children can adjust them as needed. 1 x Posture Corrector1 x USB Cable Item Type: Posture CorrectorMaterial: ABSWeight: Approx. 167g / 5.9ozPower Supply: DC5V 2ABattery: Polymer Lithium Battery 150mAh (Battery Included)Charging Time: About 5 HoursApplicable People: 6-15 Years Old StudentsMode: 2 Gears (Voice Mode/Vibration Mode)