This is a great product that I got sent for free. It has a handy USB-C charging plug and charges pretty quickly and lasts almost a full day on low without being plugged in. I have used it in my car to help the air quality in there and I could feel it was better than it was previously. I also have tried it on desk at work and even at high, it has not bothered any of my neighbors in the office. It is small, quiet, and pretty powerful. Great product.