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I bought this because it was very cheap, but did not expect it to work, just like USB vacuum cleaners don't really work because of a lack of suction power.
After actually using it I can confirm it is a piece of crap :P Hardly any suction at all. Rotates a tiny propeller which only catches very small dust particles and cat hairs. In combination with the brush it does some cleaning, but all in all it is pitiful.
i have a usb vacuum cleaner. its absolutely terrible. last summer i swapped the cables and it became a fan. much more useful to keep cool, rather than attempting to clean the keyboard with it.
i hear this is really good: http://www.metrovacworld.com/DataVac%20Electric%20Duster
매우 싸서 사긴했지만 잘 작동하리라고 생각하진 않았습니다. 마치 usb진공청소기가 흡입력이 약해서 작동하지 않는 것 처럼요.
실제로 써보니 완전 조잡한 물건이네요. 뒷면에 있는 프로펠러가 돌면서 작은 먼지와 고양이 털 같은 것들만 처리 됩니다. 브러시와 함께 쓰면 약간의 청소 효과가 있긴 합니다. 허나 결국은 매우 안습입니다.