Yes, the RGB light can be turned off.
Please long press the light mode switch button for 3-5 seconds to turn off the RGB light.
About our ProtoArc EM11 mouse, please press the DPI button to adjust the DPI(1000/1600/2400).
When you adjust the DPI to 1000, the DPI indicator flashes once, when the DPI is adjusted to 1600, the DPI indicator flashes twice, and when the DPI is adjusted to 2400, the DPI indicator flashes three times.