Logitech is seeking growth by appealing to the many people who don't own both a mouse and keyboard and by selling more expensive devices. A "forever mouse" could fall under the latter.

Logitech shares were down 8.6% in early Wednesday trade. Analysts were caught by surprise by the late-night announcement, which came after Tuesday's market close.

Following its Brazilian certification and an image leak, the MX Master 4 has now appeared in a filing with the EUIPO. Here's what it looks like.

Logitech might also offer a new and enhanced sensor in its flagship mouse — the MX Master 3S uses an 8000 DPI sensor, but some gaming mice can go way beyond that.