Dwason MC227 LED Wireless Mouse User manual

Hello, I've reviewed the user manual for the Wireless Mouse MC227. This document provides information on its features, including the LED backlight with various effects, adjustable DPI, and rechargeable battery. I'm ready to answer your questions about the device's functionality based on the information in the manual.
How do I turn off the backlight?

How do I turn on the backlight?

What does the LED indicator light show while charging?

What does it mean when the LED1 red light flashes slowly?

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The device has been evaluated to meet general RF exposure requirement.

The device can be used in portable exposure condition without restriction.