Features: brand new and high quality Instructions for use: Two channels of 12V power supply, the 12V fan is running at full speed (12V is the yellow and black lines), and one channel of 5V is used for power supply, and the 12V fan can use 5V to reduce the speed and reduce wind noise (5V is the red and black wire). 7V all the way to get power, 12V fan can use 7V to reduce the speed and reduce wind noise (5V is the red and yellow wire). Note: Some power supplies do not support 7V power supply, so plugging in the fan power supply that does not support 7V power supply will stop working, and you need to unplug the fan to restart. Product function: To solve the problem that the 3Pin or 4Pin interface is not enough, it is necessary to change the different interface to adjust the speed of the fan. Product interface: power supply 4Pin to 3Pin interface is divided into four channels (2 12V, 1 5V and 1 7V). Product usage: Power supply D port can start 2 12V or 5V and 7V fans at the same for time It can be used to reduce the speed of the fan, and it can be used as a speed-down line. Specifications: Product voltage: 2 12V, 1 5V, 1 7V. Wire model: 1007 22AWG Insulation material: PVC insulation Conductor specification: 17x0.12TS Conductor material: tinned copper Wire outer diameter: OD1.6mm Rated temperature: 80 Wire color: black, yellow, red Material: PVC Color: As the Picture Shows Product Dimension: approx. 12.5cm/4.92inches Net Weight: 10g/0.02lbs Note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x 4pin to 4pin One Minute Four Speed Control Line