This type of fan friend:
Amazon.com: MASSEY, NOW PMX, 4 inch Personal Fan, Gray/Silver: Kitchen & Dining

Walmart has this type of fan right now. Honestly I would advise anyone reading if you looking for a fan buy a few of these. There about 6 bucks right now. But there fan goes by a different name.

If you decide to buy another "inline fan" buy a 6 or 8 and use your other one as an active intake.