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The design is that the eye protecting ring at the top of the pen.It is through the inner wall of this eye protecting ring to activate the sensor, to enter the working state.So the eye protecting ring by the distance between eyes and writing paper induction.When the distance through the close will flash a red right and vibration to remind is transferred to the correct position.Its power comes from the product when writing induction.Pen itself bring the vibration of the raw power and stored.
Eye ring is equipped with a small webcam at the same time.The child's writing posture can be transmited in parent's mobile phones.Parents can watch the chi