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all
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Default. Used for all types of media devices.
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print
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Printers use it.
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screen
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Used for computer screens, tablets, and smartphones, among other things.
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speech
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Screen readers that "read" the page aloud are examples of this.
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any-hover
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Is it possible to hover over elements using any of the available input mechanisms?
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any-pointer
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Is there a pointing device available, and if so, how accurate is it?
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aspect-ratio
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The proportion of the viewport's width to height
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color
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The output device's bit rate per color component.
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color-gamut
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The approximate color gamut supported by the user agent and output device.
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color-index
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The maximum number of colors that the device can display
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grid
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Regardless of whether the device is a grid or a bitmap.
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height
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The height of the viewport
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hover
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Is it possible for the user to hover over elements using the primary input mechanism?
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inverted-colors
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Is the browser or the underlying operating system inverting colours?
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light-level
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The current level of ambient light.
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max-aspect-ratio
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The greatest possible ratio between the width and height of the display area
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max-color
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The output device's maximum number of bits per colour component.
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max-color-index
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The maximum number of colours that the device is capable of displaying.
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max-height
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The maximum display area height, such as a browser window
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max-monochrome
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On a monochrome (greyscale) device, the maximum number of bits per "color"
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max-resolution
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The device's maximum resolution, expressed in dpi or dpcm.
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max-width
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The greatest possible width of a display area, such as a browser window
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min-aspect-ratio
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The smallest possible ratio between the width and height of the display area
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min-color
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The output device's minimum bit count per color component.
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min-color-index
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The device's maximum number of colours that can be displayed.
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min-height
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The display area's minimum height, such as a browser window
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min-monochrome
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The number of bits required for each "colour" on a monochrome (greyscale) device.
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min-resolution
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The device's minimum resolution, expressed in dpi or dpcm.
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min-width
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The smallest possible width of a display area, such as a browser window
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monochrome
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On a monochrome (greyscale) device, the number of bits per "colour."
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orientation
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The viewport's orientation (landscape or portrait mode)
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overflow-block
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How does the output device handle content that exceeds the viewport's width along the block axis?
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overflow-inline
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Can content that exceeds the viewport's capacity along the inline axis be scrolled?
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pointer
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Is the primary input mechanism a pointing device, and how precise is it?
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resolution
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The output device's resolution, expressed in dpi or dpcm.
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scan
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The output device's scanning process
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scripting
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Is scripting (for example, JavaScript) supported?
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update
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How quickly can the output device change the look of the content?
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width
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The width of the viewport
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