Please refer to the following considerations: 1. Make sure the room conditions are clean and ventilated. 2. Change or clean your projector's air filter monthly. 3. Don't keep the projector working for more than 4h4. Do not unplug the power line before the cooling fan stops working. 5. Avoid illegal power outages6. There should be a short interval between switching7. The power supply must be consistent8. Pay attention to the operating sequence when turning on and turning off the power9. When the projector is in use / avoid vibration and replace the new bulb in time