Please note the following considerations: 1. Make sure the room conditions are clean and ventilated. 2. Change or clean your projector’s air filter monthly. 3. Do not let the projector work for more than 4 hours. 4. Do not unplug the power line before the fan stops working. 5. Avoid illegal power outages. 6. There should be a short interval between switching. 7. Power supply must be consistent 8. Pay attention to the operation process when turning the power on and off. 9. When the projector is in use / avoid vibration and replace the new bulb in time.