@

Signifies the end of channel selection and precedes the value of the selected channel(s).

Example: 1 + 3 @ 75 Sets channels 1 and 3's levels to 75 % (191)

You can also set the value to a specific DMX value (0 - 255) by preceding it with a zero, Example: 1 + 3 @ 075 Sets channels 1 and 3's levels to 75