voice-range CSS property.

Values: <frequency> && absolute | [[x-low | low | medium | high | x-high] || [<frequency> | <semitones> | <percentage>]]
Initial value: medium
Applies to: all elements
Inherit: yes
Percentages: refer to inherited value
Animatable:
Media: speech
Computed value:

CSS Standards

CSS 1
CSS 2
CSS 2.1
CSS 3
No
No
No
Yes