XMSJSIY Cooling Fan Speed Knob Controller 12V 4 Pin PWM PC Chassis Fan Adapter Hub Power Supplied with SATA Interface for 4 Fans -1 PCS

["This computer fan speed controller is powered by SATA cable, control 4 fans at the same time through the knob, multi-speed, strong and weak as you wish, realize stepless speed change.","The 4 Pin PWM PC Chassis Fan Adapteris made of high quality plastic and metal materials for high reliability, low loss and low heat generation.","Fan speed controller with 1 knob, from 0-100 full range of speed control, to realize the heart of the speed change, the maximum output of 60W, to meet the multiple fans and high-power fan speed requirements.","Small size suitable for all types of computer cases, magnetic design, easy to install, takes up little space, external knob, more convenient speed adjustment.","Widely used in PC water cooling system. Fan connector: 4PIN (not supported 3PIN 2PIN). Power supply interface: SATA interface."]