For context, I bought this as an exterminator for the purpose of cleaning out or flushing Pest populations in small appliances like toasters and microwaves. Using mostly the crevice tool but also the inflator tool, I've injected air into cabinet framing and small appliances to help locate and flush pest activity. The air speed is strong. The speed control is a good balance of moveable and firm. No issues with the power button. Much smaller than a can of compressed air. Surprising weight in the handle. 3 to 5 minutes use and the battery indicator is at 2 of 4 lights. For a once a month or once a day keyboard cleaning, it's a great machine. If you're using it for repeated short use on multiple jobs, the USB charger can get it back up going between work sites. I'm going to be presenting a positive review of testing this to my manager as well as the 鶹 community.