... keyboard on the frame, convenient switching between pen, brush, eraser and other frequently used keys ... stronger.* Nanotechnology stearin film with good lubrication for writing, high wear resistance for long service life, easy ... Sensitive Interactive Electronic WhiteboardTypePressure sensitive, interactiveSurfaceStearin filmWritingFinger, pen or other blunt objectsCommunicationStandard USD2.0 cable, 10 ...