benq rp653k 65 4k interactive flat panel display.2. After using the sonic screen for a period of time, the reflective stripes around the screen are covered by a large amount of dust. Although some areas can be operated, calibration cannot be performed. Please wipe with a dry soft cloth, and then power off and restart Computer and recalibrate.

benq rp653k 65 4k interactive flat panel display.2. After using the sonic screen for a period of time, the reflective stripes around the screen are covered by a large amount of dust. Although some areas can be operated, calibration cannot be performed. Please wipe with a dry soft cloth, and then power off and restart Computer and recalibrate. IQTouch K interactive touch screen feature 20-point touch and dual system -- Android 8.0 system and optional OPS Windows 10Pro system. Its 4K UHD resolution facilitates presentations and collaboration. With optional multi-screen casting software, IQClass 6.0 and installation-free IQClass Plus software, IQTouch K Series can help create an interactive and collaborative teaching atmosphere in class.