Compact, highly flexible controller for 4-pin PWM fans Works as a manual speed reducer or in tandem with the automatic motherboard fan control: achieve truly quiet operation, even with high-speed PWM fans such as Noctua's industrialPPC series "No stop" mode: prevents the fan from falling below a speed of 300rpm in order to avoid BIOS fan errors Includes a 3-way splitter cable for controlling up to 3 fans simultaneously 6-year manufacturer's warranty