Precautions for use Be mindful that if you use the provided pen using a load exceeding two.5 kg, scratches may well arise about the protective glass. If you use a ballpoint pen other than the supplied pen, be careful which the display could possibly be stained with ink or ruined. https://wm-5531975.dsiblogger.com/64360261/helping-the-others-realize-the-advantages-of-wm55