--- a/hardware.rst	Thu Sep 10 10:34:08 2015 +0300
+++ b/hardware.rst	Thu Sep 17 11:04:48 2015 +0300
@@ -147,8 +147,8 @@
   ``smartctl``
                 Show S.M.A.R.T. reports about disk heals.
 
-Fan/temperature.
-================
+Fan/temperature/voltage.
+========================
 
 Detect available sensors::
 
@@ -163,6 +163,8 @@
 
   $ sudo sensors
 
+``sensors`` uses ``/sys/class/hwmon/*`` hierarchy.
+
 HDD temperature through SMART::
 
   $ sudo hddtemp /dev/sd?