AULA USB RGB Gaming Keyboard Headset Combo, Punk Clicky Blue Switches Mechanical Keyboard + Rainbow LED Headset with Mic, Wired USB PC Game Keyboard Headset Bundle

"MULTIFUNCTIONAL KNOB: CONTROL MEDIA VOLUME AND BACKLIGHTING How to switch the mode of the knob? Long press the knob until the LED light is off: enter multimedia mode.

Long press the knob until the LED light is on: enter backlighting control mode.

Lighting Effect Control When the LED light of the knob is on, it's in lighting effect control mode: 1.Click the button to switch the lighting effect and store up to 19 effects.

2.Rotate the knob to adjust brightness.

3.FN+"\u2190/ \u2192" to adjust lighting moving speed.

4.You can customize three lighting effects according to your preference through M1/M2/M3 keys."