AXIAL FAN, 40MM, 5VDC, 75MA; SUPPLY VOLTAGE VDC:5V; FAN FRAME TYPE:SQUARE; FAN FRAME SIZE:40MM; EXTERNAL DEPTH:10MM; BEARING TYPE:BALL BEARING; AIR FLOW - CFM:4.2CFM; NOISE RATING:22DBA; POWER RATING:375MW; RATED SPEED:4500RPM