The Evercool 35mm X 10mm 5 Volt Fan is designed for low noise operation and a 5 volt power source. The connector on this fan is a D type 2-pin connector used on some video cards, external enclosures, and circuit boards.
The Evercool 70mm x 10mm Low Speed Fan mounts on standard 70mm fan holes. This fan puts out a nice ratio of air flow vs. noise levels. This fan uses a standard 3-pin connector.
The Evercool 80mm X 10mm 5 Volt Fan is designed for low noise operation and a 5 volt power source. A 3-pin to 2-pin adapter cable is provided for 2-pin applications.