diff --git a/cpu.md b/cpu.md
index 1dce16e..3c49f64 100644
--- a/cpu.md
+++ b/cpu.md
@@ -4,14 +4,13 @@ Shows in a textbox the average CPU usage percent for a given amount of time.
 
 	mycpuusage = lain.widgets.cpu()
 
-The function takes a table as optional argument, which can contain:
+### input table
 
 Variable | Meaning | Type | Default
 --- | --- | --- | ---
-`refresh_timeout` | Refresh timeout seconds | int | 10
-`header` | Text to show before value | string | " Cpu "
-`header_color` | Header color | string | `beautiful.fg_normal` or "#FFFFFF"
-`color` | Value color | string | `beautiful.fg_focus` or "#FFFFFF"
-`footer` | Text to add after value | string | "% "
+`timeout` | Refresh timeout seconds | int | 10
+`settings` | User settings | function | empty function
 
-**Note**: `footer` color is `color`.
\ No newline at end of file
+### output
+
+A textbox.
\ No newline at end of file