Honeywell RET97E5D1005/U Wi-Fi Programmable Thermostat Remotely view and control the temperature of the home; Alerts - high/low temperature, loss of connection to network Secure Network Real time clock -keeps the time during a power failure and automatically updates the time for daylight savings (optional) To complete initial set-up, a device with Wi-Fi capabilities and a web browser is required; A compatible 802.11b/g/n wireless router