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Title: Must have for all DSLR owners or timepiece hobbyists.
Review: I own a couple of watches and I also own a Pentax K-m/K2000 DSLR. I originally intended to use this for cleaning my DSLR, but I found out that these can be used to blow dust off of watches when changing batteries or opening the case. At first I thought it was nuts how they are charging this much just for a rubber air blower. But when I received it, I found out that there is no way you can own a DSLR without owning one of these. These things blow dust out of your DSLR without sucking it back in, it sucks air from the back through a filter and blows it through the front. These rocket blowers are very strong, I tried blowing it on my face a couple of times to test the power, to my surprise I couldn't breath when I do it because it's so strong that it feels like you're dropping from a hill on a roller coaster.
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