diff --git a/amixer/amixer.1 b/amixer/amixer.1
index 37a0a9c..b40f14e 100644
--- a/amixer/amixer.1
+++ b/amixer/amixer.1
@@ -76,7 +76,13 @@ the \fIcset]fP command.
 .TP
 [\fI-c\fP card]
 
-Select the card number to control. Cards are numbered from 0 (the default).
+Select the card number to control. The device name created from this
+parameter has syntax 'hw:N' where N is specified card number.
+
+.TP
+[\fI-D\fP device]
+
+Select the device name to control. The default control name is 'default'.
 
 .TP
 \fI-h\fP