The NA-SRC7 is a fan accessory set consisting of three fully sleeved NA-RC7 Low Noise Adaptors (LNA) for Noctua 4-pin PWM fans. Connected between the fan and the power source, the adaptors reduce the running speed and noise emission of the fans. The NA-SRC7 is ideal for slowing down Noctua\'s redux edition fans (see speed tables).Features:- Reduces the speed of 4-pin PWM fans by approx. 30%- Fully sleeved- Supplied in a pack of 3Specification:- Cable length: 110mm- Connector: 4-pin