Review on Cordless Electric Air Duster: Efficient Handheld Blower for Electronics Cleaning, Replace Compressed Gas Cans, Rechargeable Battery, Powerful Cleaning Performance, Fast Charging - 6600mAH, 36000 RPM by James Pfettscher

So I use this one because not only do I need it to protect my computer and other electronics from dust, but I also have four fans (I live in a hot climate). Compressed air wasn't possible as they tend to spray not only air but also coolant (or whatever) causing the dust to stick to the plastic the fans are made of. This thing is versatile for me. It's basically a hair dryer that doesn't blow hot air (just ambient temperature) and you can use the included nozzle to direct the air. I would say the price was a bit more than I was willing to pay BUT I also did a little research on these things and found this to be the best for my needs.