Amazon has the Ecobee3 lite WiFi Thermostat for $149 (regularly $169) with Free Shipping for a limited time.

The Ecobee3 lite thermostat features a programmable color touch-screen, built-in Wifi, and works with Amazon Alexa and Apple’s HomeKit. It helps you maintain a comfortable home and has Home IQ to conserve energy. It supports remote sensor (not included), which track temperatures across your home and adjusts temperatures accordingly