Edimax Technology Edimax 24 10/100TX + 2 10/100/1000T/Mini-GBIC Combo Web Smart Switch ES-5226RS - Manual (Page 14)

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[NOTE] For proper ventilation, it allows about at least 4 inches (10 cm) of
clearance on the front and 3.4 inches (8 cm) on the back of the Switch. This
is especially important for enclosed rack installation.
Power On
Connect the power cord to the power socket on the rear panel of the Switch. The
other side of power cord connects to the power outlet. The internal power supply
of the Switch works with voltage in the range of 100-240V
AC
and Frequency of
50~60Hz. Check the power indicator on the front panel to see if power is properly
supplied.