17English5. Maintenance and cleaning5.1 MaintenanceRegularly check the product's physical state, e.g. check for damage of the housing.If you suspect that safe operation cannot be guaranteed anymore, disconnect the product and ensure that itcannot be used by mistake.You can assume that safe operation is not possible anymore when• the device shows visible damage,• the device does not function anymorePlease note:The product is maintenance free for you. Inside the product are no parts that can be checked orrepaired, so do not ever open it.5.2 CleaningWipe the product with a clean, dry cloth. If the device is very dirty, you can moisten the cloth with lukewarmwater.Ensure that no liquids can get into the device.Do not use any chemical cleaners, since they could damage the housing surface or the screen(discolorations).6. DisposalDevices with this marking should not be put in the household garbage. Dispose of theproduct at the end of its lifetime according to the applicable regulations.Resolution / - By pressing this button you can choose the resolution. By pressingthis button several times you can switch between the differentresolutions.You can choose between following resolutions:800x600 Pixel @ 60Hz800x600 Pixel @ 75 Hz1024x768 Pixel @ 60 Hz1280x1024 Pixel @ 60 HzMany monitors have an automatic adjusting function therefore itcan take some seconds that the picture calibrates.In the menu you can decrease the value by pressing this button. Ifyou press it for longer time you can decrease the value faster.