Review on RIYONG Portable Purifier Air Cleaner Rechargeable by James Bullets

This filter is surprisingly quiet for its performance. I almost forgot it worked. Due to its size and low noise level, it lets a lot of air through the filter. I appreciate the non-mechanical touch button for turning on and off. Eliminates another moving part, reducing the chance of problems. The filter cover is very cleverly designed: it is held in place by magnets instead of snapping into place. My charge lasted more than 6 hours, which is more than enough to temporarily move away from a power source. I appreciate the C-type connector that makes it easy to connect. The clamp is very strong when you need to fasten it. But I like to remove the clip and just place the device where I want; It is very compact without the included clip. It is very easy to remove and replace. The filter is very large and has a large surface area, so it doesn't need to be replaced as often as once a month; maybe once every 3 months with constant use. At my usage level I can go 6 months without needing a new filter. As far as compact filters go, this one seems to be the best available considering how much air it cleans, how big and efficient the filter is, how quiet it is and how long it holds a charge. Highly recommended!