A small but not to be underestimated problem is that the Rocket has only one valve and which is between the "rocket legs". He sucks the air for blowing at - but not only there: the red outlet nozzle is unfortunately valve free!
.. So in the worst case - Ie if you have, for example, dropped an air flow to the sensor in the sensitive inside a camera and with the top interior yet again pushes the Rocket to the second blow, he sucks in air by the outlet nozzle whirled dusty air. One can of course make a vacuum cleaner effect to good, only you should know. Otherwise it is at least theoretically eternal in and out of the dust particles and it remains virtually the previous state. Only the dust is probably distributed differently ;-) So blow pure, Rocket can be compressed and "breathe" again only outside the camera. Or deliberately use the Rocket as vacuum cleaners: keep the valve between the rocket legs, go with the bellows in the camera body and there Extract air = dust in exposed areas, for example through the sensor (low-pass filter).. Then blowing course outside of the camera!
One star deduction, because the manufacturer does not plan indicates that he (sometimes fatally) sucks even where he should just blow, yet (better!) Has the Rocket Air Blower donated a second valve.