Application:
For children and students,preventing from crookback and short sight;for drivers, to prevent from dogsleep,avoiding traffic.
accidents.
Usage:
1.When using,open the on-off first and hang it on the right ear.And then adjust the sensitivity.
2.When you are reading ,your eyes are too close to the desk,it will sound to remind you .The sound is lower than 2dB,and it won't disturb other students.
Notice:
1.Not using,please close it,avoiding a waste of power.
2.when the sound is becoming lower,please change the battery in the back lid.
3.Be care not to lacerate the ear when using.
Dimension:8*2*1.5cm |
