This is a cordless mouse from Logitech the model is the MX 1100 (RCR147R)

It’s a great Mouse lasting a very long time very accurate and has just the perfect number of buttons

To use it you need only one double AA battery

You can see the PCB inside the mouse the big chip is the microcontroller the brain of the mouse

Logitech MX Anywhere 2: best overall mouse

Evoluent VerticalMouse: ergonomic mouse

Logitech M570

Logitech G903 Lightspeed for gaming

Microsoft Wireless Mobile Mouse 3500: cheap and good

VicTsing Wireless Mouse

G602 Lag-Free Wireless Gaming Mouse: gaming, buttons

Logitech M510 Wireless Mouse

Apple Magic Mouse 2: for mac fan

Logitech M705 Wireless Mouse

M330 Silent Plus

Microsoft Wireless Mobile Mouse 3500