Keyboard Specifications:</b></br> Keys: 104 key</br> Built-in battery capacity: 4000mAh</br> Light Effects: Adjustable 16 kinds of RGB backlight FN+↑/↓: Increase/Decrease the backlight brightness; FN+←/→: Speed ​​up/Slow down the backlight speed; FN+1/2/3/4/5: Switch 16 kinds of RGB backlight(+1=gradient streamer mode,+2=pulsating streamer mode,+3=7+mixed color breathing mode,+4=7 color+blending gradient mode,+5=monochrome light+blending constant brightness 8 switching )</br> Multimedia Knob:</b></br> Pressing the VR knob button can switch multiple backlight modes of the keyboard.When you press the FN+VR knob button,the VR knob function enters the multimedia playback mode.Turning the VR knob left and right can adjust the volume,then pressing the VR knob button can make it mute,andpressing it again will resume playback.</br> When the keyboard is in the breathing backlight mode-turning the VR knob left and right can control the breathing speed.Turning it left will slow down the light breathing speed, and turning it right will speed up the light breathing speed.</br> Mouse Specifications:</b></br> Adjustable 4 DPI: 800-1200-1600-2400</br> Built-in Battery Capacity: 800mAh</br> Light Effects: 7 monochrome color auto switching breathing mode, not adjustable</br> Button: 6 Buttons</br> Note:</b></br> 1.The keyboard and the mouse share one USB receiver, which place in the bottom of the mouse, insert the receiver into the computer USB port, they will auto connect.</br> 2.For better using, please make sure the keyboard and mouse is full charged in their first use.</br> 3.The keyboard will auto enter sleep mode if no operation in 3 minutes, and press any key can wake it up.</br> 4.The keyboard and mouse can be charged by using DC 5V adapter, but cannot support quick charger adapter.</br> Package Included:</b></br> 1 x Knob RGB Backlight Keyboard and Mouse Combo</br> 1 x Charging Cable</br> 1 x User Manual