Small ultra-thin fan made for laptops and servers - part# BAAA0508R5H by AVC operates on 5VDC and is only 0.32" thick x 2.17" square. Produces a nice amount of air flow with very low noise. Can operate from a 3V coin battery or a 9V battery without harm. Amazing little blower fan. Has 4 leads to power up, just connect red and black leads to power. Brand New! Retails for over $20 each.
Sold in a package of 2.