Check the listing for details. VTRONIX LAKEPRO-1 Wi Fi Enabled, Programmable Thermostat (Requires a C Wire). Color: White, Condition: New. Listed at 59.95 USD. KEY FEATURESSingle or multiple stage HEAT, COOL, or HEAT/COOL systems up to 3H/2C stages.24 VAC Hardwired - (Requires 'C' wire)RC, R, C, Y, G, Y2, O/B/W, AUX/W2, E, L terminalsExtra large (4.36" * 2.17") LCD display with optionally Permanent BacklightWi-Fi(802.11 b/g/n @ 2.4GHz) connectivity allows remote access through a tablet or Smart phoneAdvanced P+I controlAbout this item Universal system compatibility, precise comfort control and easy to program Lake Pro provides temperature control for gas, oil, electric and heat pumps for up to 3 heat 2 cool systems. Above all, you can remotely monitor via WIFI and control the heating and cooling system in your home or business — you can stay connected to your comfort system wherever you go. In a world with a greater sanitation focus, flat screens make for easier cleaning. Older style thermostats with many buttons can be easily damaged through frequent use of disinfectants and other cleaning supplies.Wi Fi enabled Programmable thermostat. Fits many HVAC configurations for conventional (up to 2 stages) and heat pump systems (up to 3 stages). Not suitable for dual fuel systems without a fossil switchover kit. Large backlit display and touchscreen. Celsius or Fahrenheit display. Optional 7 day schedule programmable. And, if size is important to you, this thermostat has one of the biggest display/touchscreens on the market: almost 2.25" by 4.25"- that's 9.6 sq. inches of touchscreen!