3 to 4-pin adapter	12CM LED CASE FAN AK-174CB-4BLB has crystal blue frame and 4-blue LED. The fan glows a fantastic blue. It is a perfect solution to improve the case appearance and at the same time increase air circulation and cooling performance. Crystal blue frame and blades 4-blue LED  Application  PC Case fan  Fan dimension  120 x 120 x 25mm  Fan speed  1700 R.P.M.  Fan airflow  59.05 CFM  Fan air pressure  3.57mm H20  Fan life expectancy  50000/hrs  Bearing type  Twin Ball Bearing  Connector  3-pin with RPM sensor wire  Voltage rating  12V  Noise level  29.75 dB(A)  Product code  AK-174CB-4BLB 3 to 4-pin adapter 4 case screws akasa is not responsible for the content of external internet sites Extremereviews.net "to anyone who wants to improve their case appearance and at the same time improve air circulation." more..