Fans - Finger Guards, Filters & SleevesFilters are electronic devices that are used to remove unwanted signals or frequencies from a circuit or system. EMI optimization is the process of reducing the effects of electromagnetic interference (EMI) on electronic devices and systems. Fans are mechanical devices that are used to move air or other gases to cool or ventilate electronic devices and systems. Finger guards, filters, and sleeves are a variety of items that can be used in conjunction with fans to improve their performance and safety. Finger guards are protective covers that can be placed around the blades of a fan to prevent fingers or other objects from coming into contact with the moving blades. Filters are mesh or screen-like materials that can be placed over the intake or outlet of a fan to prevent dust, dirt, and other contaminants from entering or exiting the fan. Sleeves are flexible materials that can be placed over the blades of a fan to reduce the noise generated by the fan. These items can help improve the performance and safety of fans and make them more convenient and user-friendly.