/usr/share/libwacom/generic.tablet is in libwacom-common 0.18-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 | [Device]
Name=Generic
DeviceMatch=generic
[Features]
Reversible=true
Stylus=true
Ring=true
NumStrips=2
Buttons=4
|