First, no battery is included. You must provide your own battery. Keep in mind. As for the color, as you can clearly see in the picture, it is darker blue than the picture here. As for the sound, it's very quiet. Clicks are not audible, which is a big plus. So it's true that if someone sleeps in the same room, you can still continue working. As you can see from the picture, this is a very ergonomic little mouse. It feels comfortable in my hand. I have small/medium female hands. As for the USB connection, I had no trouble getting it to work. How did I set it up? pack opened. USB unplugged from the mouse [it's inside the mouse, that's how it's packaged], plugged into the laptop's USB port, plugged the battery into the mouse's battery holder, turned on the little switch under the mouse and no, wait, it works . As for the little switch under the mouse, I like these switches, although lately mice don't have them and they turn off after 1 minute of inactivity. This mouse will also be deactivated after 1 minute of inactivity, and a simple left click will activate it. It's been 5 months since I put the battery in and it's still working without any issues to this day, averaging 1 hour of daily use. The only unexpected aspect was the color. In addition, the setup process, silent clicks and size pleases.
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