MechDoc Smart Thermostat, Works with Alexa Echo and Google Assistant, 7 Day Programmable WiFi & Bluetooth Thermostat for 1 Heat/1 Cool HVAC, APP and Voice Control, 24VAC Power, C-Wire Required, White

Wide Range Application - Works with 85% Systems: Single Stage 1 Heat and 1 Cool HVAC Systems of Gas or Oil Heat, Electric Furnaces, Heat Pump without Aux Heat, Cool/Heat only System (Floor or Wall Furnaces). Not support 110V/220V system! - Before buying, check #4 main image to see the wiring diagrams. Our thermostat only support conventional systems and heat pump systems with no more than 6 wires of RC, RH, C, G, W/O/B, Y. (RC/RH: cooling/heating power; C: C wire; G: fan switch; Y: Cooling switch; W: heating switch; O/B: heat pump changeover valve). Take off your thermostat, take a photo of the wire connections for later reference. Use sticky tags to label each wire as you disconnect it.

24VAC Power Supply Needed - Important! C-wire is required and is the primary power source for our thermostat. Battery Power NOT Supported! Without a C-wire, our thermostat will not power up (e.g. LCD will not light up), and it means our thermostat cannot be used in your system. Before purchasing, check if the C-wire had installed in your home, or determine if your home needs a C-wire power adapter. C-wire and C-wire power adapter are sold separately.

Smart Home Integration - This Smart 7-Day Programmable Wi-Fi Thermostat is compatible with voice assistant devices like Amazon Alexa, Google Assistant.

Easy Programming and Energy Saving - Take advantage of the 7-day with 4 periods per day flexible programming schedules to optimize your energy consumption and fit your life.

Easy-to-Use-APP - Choose from the Smart Life app, Alexa app or Google Assistant to control your Wi-Fi thermostat anytime, anywhere. (Only Support 2.4 GHz Wi-Fi, NOT Support 5 GHz Wi-Fi)

Easy Operation and Reliable- 6.8 sq. inches’ Big backlit digital display and easy controls make for a user-friendly experience. And designed for long-lasting performance, our Wi-Fi thermostat offers reliable performance and precise temperature control.

Find an extra wire as C wire - If you don’t have a C wire, to check if has an extra wire can act as C wire, it might be pushed into the wall or wrapped around the wire bundle. Found it and connect this unused wire to the C terminal on our new thermostat, connect the other end of the C wire to the C terminal on the control board of your heating/cooling system.