A vacuum cleaner is a thing that can be found in almost every home. However, few people think about the device construction. Its construction is relatively simple, and the filter plays a crucial role in it. Without a high-quality filter, the cleaning effect will be minimal, even if the vacuum cleaner has a powerful motor. At the same time, the filter is the part of the vacuum cleaner that needs to be changed periodically. If you own the Mijia BHR4681CN cordless vacuum cleaner, then you should get a replacement HEPA filter. The device effectively filters out dust, animal hair, and other debris without preventing it from re-entering the environment.