ELECOM DUX 70BK Mouse

This mouse came out in 2016, from Japan.

It has amazing features, never seen on a mouse before.

here's the marketing blurb:

• It is a "DUX" MMO gaming mouse with a wireless receiver that can connect a mouse wired and wirelessly to two separate personal computers and operate them simultaneously.
• Useful for operations of 2 characters, simultaneous play of two games, operation of capture site display.The side scrollable tilt wheel and the side wheel operated by turning sideways are carried.
• Assignable preference function to 25 places with 19 buttons and 2 wheels. Functions can be registered separately for each button on the main PC and sub PC, and complicated operations can be realized.
• Onboard memory that can save 5 button settings and 4 DPI settings in the mouse body is carried.
• It responds accurately to the speed of up to 130 inches / second and acceleration of 30 G, and it is possible to operate the cursor according to the image.

This thing is quite amazing.

• 19 buttons. (counting wheel left/right)
• Optical sensor.
• weight: 120g (not counting cable)

There's not much info in English yet.

review on reddit 2021-02-21 https://www.reddit.com/r/MouseReview/comments/loq8wi/elecom_mdux70bk_with_21_buttons_and_two_scroll/