This is probably the gentlest blower on the market, and one of the safest for use inside the computer case. It charges quickly, has a wide range of wind speeds, and does an excellent job of light cleaning. If the heat sink and fan are really dusty, you'll need something more powerful, a WolfBox blower, or something similar, but for routine maintenance, I highly recommend this device. You'll want to save the vacuuming for the outside of the case and the keyboard to eliminate the possibility of a static buildup, but you have that function, when you need it. I couldn't be more please with the purchase.