RTM-500
Use the side buttons
The buttons on the pen can be set to two different customizable functions.
You can use the buttons whenever the pen tip is within 10mm of the tablet active area.
You do not have to touch the pen tip to the tablet in order to use the switch.
Pen Nib Replacement
The nib will be wear off after using for a long time, then you need to replace a new nib.
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