varioshop Castellano® Premium Smart LED Video Projector, Portable, 4K UltraHD, Android 11, Built-in Speaker,

Instructions for Use/Warnings: Please note that this projector is equipped with a dust filter, and the frequency of cleaning depends on the environment in which it is used, requiring more frequent or infrequent attention. We recommend checking the filter at least every two weeks. It is easily accessible and located on the back of the device. Ignoring proper maintenance can cause overheating and may result in slight damage to the lens, causing a yellow stain on the projection screen. Regular maintenance of the filter will ensure optimal performance and extended life of the device.