root@Csabi:~# xinput --list --short
⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ ImPS/2 Logitech Wheel Mouse               id=10   [slave  pointer  (2)]
⎣ Virtual core keyboard                         id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Power Button                              id=6    [slave  keyboard (3)]
    ↳ Power Button                              id=7    [slave  keyboard (3)]
    ↳ saa7134 IR (ASUSTeK P7131 Analo           id=8    [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=9    [slave  keyboard (3)]
root@Csabi:~# xinput --list-props "ImPS/2 Logitech Wheel Mouse"
Device 'ImPS/2 Logitech Wheel Mouse':
        Device Enabled (153):   1
        Coordinate Transformation Matrix (155): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
        libinput Accel Speed (290):     0.000000
        libinput Accel Speed Default (291):     0.000000
        libinput Accel Profiles Available (292):        1, 1
        libinput Accel Profile Enabled (293):   1, 0
        libinput Accel Profile Enabled Default (294):   1, 0
        libinput Natural Scrolling Enabled (295):       0
        libinput Natural Scrolling Enabled Default (296):       0
        libinput Send Events Modes Available (275):     1, 0
        libinput Send Events Mode Enabled (276):        0, 0
        libinput Send Events Mode Enabled Default (277):        0, 0
        libinput Left Handed Enabled (297):     0
        libinput Left Handed Enabled Default (298):     0
        libinput Scroll Methods Available (299):        0, 0, 1
        libinput Scroll Method Enabled (300):   0, 0, 0
        libinput Scroll Method Enabled Default (301):   0, 0, 0
        libinput Button Scrolling Button (302): 2
        libinput Button Scrolling Button Default (303): 2
        libinput Middle Emulation Enabled (304):        0
        libinput Middle Emulation Enabled Default (305):        0
        Device Node (278):      "/dev/input/event5"
        Device Product ID (279):        2, 5
        libinput Drag Lock Buttons (306):       <no items>
        libinput Horizontal Scroll Enabled (307):       1
root@Csabi:~# xinput --set-prop "ImPS/2 Logitech Wheel Mouse" "libinput Accel Speed" -0.95