Eye tracking pen / pen

This is based on eye tracking technology designed pen. There are three pen body-side sensing area.Three induction zones correspond to users of different ages. By pressing the corresponding button on the control you begin sensing area. After work, when people eye to the sensing area when the distance is less than 33.33 centimeters by releasing an internal spring refill cartridge indentation.When the user replies correct posture sensing area pop refills automatically receive information.In exceptional circumstances if the switch is turned off failure but the pen can be used normally.