This is 4-Pin CPU Fan Cooler Speed Controller for PC. It has high quality and durable to use， good choice for you.                                    Features            New and high quality<br>RPM alert<br>Control voltage from 5V to 12V<br>Channel supports up to 12W<br>Manually adjust from full speed to low speed<br>Suitable for other high RPM fans<br>Stop working alarm<br>                                                            Specifications                        Input Voltage          12V        <br>          Output Voltage          5-12V        <br>          Output Current          Up to 1000mA        <br>          Size          2.4" x 0.98" x 0.75" (L x W x H)        <br>          Weight          16g / 0.56oz        <br>          Color          Blue        <br>                                                              Package Includes            1 x 4 Pin CPU Fan Speed Controller<br>