There is no on/off button. If you're using your dual connection Ember radiant panel in the plug-in configuration, it can be unplugged when not in use or paired with compatible plug-in control devices like a timer. If you've elected to convert your dual connection radiant panel to a hardwired connection, the radiant panel should be wired to a hardwired control option like a switch, a hardwired timer, or a hardwired thermostat.