Improve power settings

settings.h

@@ -82,7 +82,12 @@ enum {
 };
 
 enum {
-	OUTPUT_POWER_LOW = 0,
+	OUTPUT_POWER_USER = 0,
+	OUTPUT_POWER_LOW1,
+	OUTPUT_POWER_LOW2,
+	OUTPUT_POWER_LOW3,
+	OUTPUT_POWER_LOW4,
+	OUTPUT_POWER_LOW5,
 	OUTPUT_POWER_MID,
 	OUTPUT_POWER_HIGH
 };