Q: The mouse side light it always light up red?

A: Yes, in order to make the mouse smarter and more energy efficient, many customers have responded that they need to remove the blue colored light on the side, so our engineers recently upgraded the mouse, and removing the blue led light of the mouse transparent bar, making it smarter and more energy-efficient. Now the side light is red because the red light at the bottom of the mouse is reflected. The upgraded mouse chip is better, and the continuous working time is longer when the mouse is fully charged. We hope you enjoy the improvements and that you will let us know of any future improvements that you would like to see. Thank you! ^_^