Vibration way reminder student eye protection apparatus

Product synopsis:
(lets student friends, in does not affect in other schoolmate's situation to be able completely peaceful prevention nearsightedness, to prevent, correction sitting posture humpbacked, is student 1.5 vision protectors which a section receives welcome)

Operating instructions:
This product uses the ear suspension type modelling, when the use "student vision protector" the switch opens, then vertical wears on the right ear (round hook faces forward), when will lower the head will surpass the standard angle namely will vibrate the warning immediately, the reminder attention, after treating the read-write posture correct, automatic stopping warning.