The eZNT-T331 network thermostat combines local room sensors with a fully programmable controller with 3 universal inputs, 3 analog outputs and 1 binary output. The eZNT-T331 also offers a choice of backlit colors that provide additional user feedback and esthetic appeal. The eZNT NFC technology enables installers to use NFC-enabled mobile devices to configure the thermostat on the wall or in its shipped box