ITEM NAME:4pin 1 to 2 Ways Connector PWM Fan Power Supply Y Splitter Extension Cable Description: - Material: plastic+metal - Cable length: approx. 30cm/11.81inch - This extension cable enable control 4pin connector on the motherboard speed and thermostat 2 fans simultaneously. - The extension cable can keep the air flow balance and prevent hot air backflow when the chassis fan has no acceleration. - Dual fan cable can make the fan quieter and achieve better heat dissipation. Package Included: 1 Piece PC Fan Power Cable.Dual fan cable can make the fan quieter and achieve better heat dissipation. - The extension cable can keep the air flow balance and prevent hot air backflow when the chassis fan has no acceleration.