KEY2: Pause(it is valid at gradation mode)
KEY3: Speed up (it is valid at auto-change mode)
KEY4: Speed down (it is valid at auto-change mode)
KEY5: Brightness up（it is valid at single color and auto-change mode）
KEY6: Brightness down（it is valid at single color and auto-change mode）
KEY7: Single color change mode
KEY8: Continous color changing mode
The 12V and GND marking on the controller should connect with DC12V+, V- .
The R.G.B marking on the controller connect the R.G.B signal channel of light source.