Precautions for the use of the touch screen: 1. When using the touch screen, please use the touch screen provided by the manufacturer as much as possible. Do not use some sharp objects, which may damage the outer touch skin and make it impossible to operate. (Try not to use your fingers, so as not to leave too many fingerprints, which will make the screen look a little fuzzy, which will cause inconvenience to observation.) 2. Every time you press the button, please make sure that there is nothing else on the screen; 3 , Each button is displayed with an icon, so every time you press the button, please press it accurately on the icon to achieve the most precise positioning; 4. Each time you press the button, you don’t need to hold it for a long time (such as pressing For a long time, it may lead to inaccurate positioning or failure to confirm this contact.) Just touch it; 5. When cleaning the surface of the product, please wipe it with a soft cloth (deerskin) dipped in petroleum ether. Touch screen maintenance: 1. Wipe the screen with a dry cloth before turning it on every day; 2. Water droplets or drinks on the screen will cause the software to stop responding and need to wipe off foreign objects such as water droplets; 3. The touch screen controller can automatically determine the dust. But too much dust will reduce the sensitivity of the touch screen, you need to wipe the screen clean with a dry cloth; 4. Use glass cleaner to clean the dirty fingerprints and oil stains on the touch screen; 5. Do not wipe the touch screen film with corrosive organic solvents surface. Such as: wiping machine water, industrial alcohol, etc.