How to use?
1. Pull out the pen;
2. Writing on the writing area directly with the pen;
3. Press the remove button to erase the writing content;
Remark: please replace a new battery when remove button without function.
4. How to replace the built-in battery?
Lossen the screw,pull out the battery pack to replace new battery.
5. in case of losing the pen, please use a lanyard to connect to the pen.