Here is the Air Mouse!!! 
I was inspired by the design of Optimum and its zero-mouse to gain in lightness and performance. With its unique all-in-one chassis, this mouse weighs no more than 21g.

How it works ?

I designed the mouse so that your fingers are perfectly guided over the 5 holding zones. This shape requires you to hold the mouse in a relaxed version of the “fingertip grip”. By removing everything else from the shell, the lightness of the air mouse allows for greater precision and speed. It becomes so pleasant that you almost forget you hold it!

How to assemble it?

1) Put the electronics like the classic mouse
2) Using a hair dryer or heat gun, gently fold the clips on the PCB then the clicks so that they are almost touch buttons
3) Put the battery in and it's ready !

Hope you like it :)

Optimum's vid :