Connections: 1x USB-A, 1x 9-pin USB cable for connection to a 9-pin USB header on the motherboard, 1x 4-pin PWM cable connection for connection to the motherboard. The 2.4 GHz wireless signal controls the lighting effects and fan speed wirelessly. Maximum number of fans: 20 UNI FAN SL LCD Wireless or 40 UNI FAN SL LED. Two connection options: either via a USB Type A port or directly to a 9-pin USB header and a 4-pin PWM header on the motherboard. Channel assignment for Strimer Wireless: 1 channel per Strimer cable. The controller ensures flexible installation and allows precise control of fan speed and lighting effects by seamlessly integrating into your system.