What a great air blower. I have been using Canned Air for years - expensive comes in a aluminum can and can't really be used on a digital sensor as it has cooling effects and can cause condensation. However, this is green and a great way to clean your lens and sensor. it gives a great air blow when squeezed and I have yet to not be able to dislodge dust from my camera.
Its a great price and any serious photographer, amateur or professional must have one in his camera bag. Also great for cleaning the keyboard of your computer!!!