3 to 4-pin adapter               12CM LED CASE FAN AK-174CR-4RDB has crystal red frame and 4-red LED. The fan glows a fantastic red. It is a perfect solution to improve the case appearance and at the same time increase air circulation and cooling performance. Crystal red frame and blades 4-red LED  Application  PC Case fan  Fan dimension  120 x 120 x 25mm  Fan speed  1700 R.P.M.  Fan airflow  56 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  29.74 dB(A)  Product code  AK-174CR-4RDB 3 to 4-pin adapter 4 case screws