Sold as a 2-pack, these adapter cables allow you to connect a mini 2-pin fan to a traditional PC fan header. Output: 2-pin male mini fan connector (0.984" / 2.5mm pitch XH-series) Pin 1: Positive Voltage (Red) Pin 2: Ground (Black) Note: the XH 2-pin fan connector wiring is not standardized across all devices and swapping the pins on the mini connector may be necessary for a very small portion of users. The cables are constructed with all black connectors and high density sleeving for minimal wire visibility. Cable length (excluding connectors): 5" / 12cm