Absolutely unusable so that leaves nothing to blow through, when you press comes out only a gentle breeze and not even a fan will run it ... I got a PC clean only with great difficulty, actually more to the vacuum cleaner than the air duster.
Saves you your money and takes better for; redirect = true & ref_ = oh_aui_detailpage_o08_s00 It costs almost the same and is much better.
Too bad that such a dirt is sold, I always wonder what think manufacturers here.