The volume of sound on a PC is controlled by rolling the mouse wheel while holding the right mouse button.
This feature works at any computer that has the USB port and with any OS without any additional software or drivers.

Casing material:: Makore (Tieghemella heckelii);
Weight: 110 grams;
Connection: USB port;
Compatibility: Windows, Mac-OS, *nix
Cable length: 0,55 m or 1,9 m

The mouse is available fors right-handers and left-handers.

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Price: 800 EUR or 860 USD