Specifications: PWM 4pin 1 to 2 power splitter Y cable Connected 2-fans to motherboard 4pin header Support PWM fan speed control all fans run in same speed PWM fan power splitter cable 1X2PWM25CM connects 2 computer case fans to a single motherboard fan header; 1 to 2 fan converter cable connects an additional fan to increase airflow in your computer case Mobo 4-Pin receptacle connects to the 4-Pin header on the motherboard and splits the signal to 2 PWM fans; Fans can spin at the same speed using software from a motherboard equipped with PWM control MASTER/SLAVE FAN PLUGS have a 4 pin fan connector a wire that sends the RPM signal to the motherboard connector for synchronizing the fan speed with the other fan. The other 3 pin fan connector omits the RPM signal pin for tandem fan speeds with both fans 3-PIN & 4-PIN FAN COMPATIBLE with popular brands of computer case cooling fans Corsair Air Series AF120 80mm / Series AF140 High Airflow, Cooler Master Blade Master 80 / Master 92, Cooler Master Hyper 212 EVO 120mm, Cooler Master JetFlo 120mm, Cooler Master SickleFlow 120mm, Cooler Master MegaFlow 200mm, Noctua NF-F12, Thermaltake WATER 3.0 Dual 240
Warm tips: please ensure your motherboard fan header is capable of the additional electrical load before purchasing