diff --git a/main.go b/main.go
index 00b88af..ea50351 100644
--- a/main.go
+++ b/main.go
@@ -26,6 +26,9 @@ COMMANDS
 }
 
 func handle(opts *options) int {
+	if opts.header {
+		fmt.Println("========== notification from NML ==========")
+	}
 	return opts.command.Execute()
 }
 
diff --git a/timer.go b/timer.go
index 5824f96..0f45c9d 100644
--- a/timer.go
+++ b/timer.go
@@ -9,19 +9,19 @@ type timer struct {
 
 func (t *timer) Duration() time.Duration {
 	switch t.unit {
-	case "min":
+	case "min", "minutes":
 		return time.Duration(t.number) * time.Minute
-	case "nsec":
+	case "nsec", "nanoseconds", "nanosec":
 		return time.Duration(t.number) * time.Nanosecond
-	case "usec": // micro seconds
+	case "usec", "microseconds": // micro seconds
 		return time.Duration(t.number) * time.Nanosecond * time.Duration(1000)
-	case "msec":
+	case "msec", "milliseconds":
 		return time.Duration(t.number) * time.Nanosecond * time.Duration(1000000)
-	case "hour":
+	case "hour", "hours":
 		return time.Duration(t.number) * time.Hour
-	case "sec":
+	case "sec", "seconds":
 		return time.Duration(t.number) * time.Second
 	default:
-		return time.Second
+		return time.Duration(t.number) * time.Second
 	}
 }