1. LED projectors, During transportation, Usually one or two dust from the exhaust port into projector, This is a phenomenon often happens, it's not the quality problem of the machine itself. some dust may stick to the lens, a little dust will not affect the projection. if have black spot in image, use Non-dust cloth wipe the lens may help. Ethyl alcohol is prohibited to use in this occasion. The customer can check our FAQ link to clear it.
2. All LED projectors, Usually higher brightness means higher noise, Buyer can try to change a Low-power fan, but it will reduce the brightness and heat dissipation, We don't accept this kind of dispute.
3. About the focusing problem of projector. It is affected by many factors. Distance is the main reason, please adjust the best projection distance, so that you have a best viewing experience. Projector performance reason(LED, DLP, Laser...), Cheaper the price, the more likely fuzzy corners, so pls choose expensive projectors if you want a perfect performance.
4. Pls do not update the firmware by yourself. If you want to update, pls contact us firstly.