The C-Wire Adapter Is Included With The Levoit Smart Thermostat For Home, Which Product Details Specifications: Power Supply: AC 24V, 60Hz Rated Power: 3W Connectivity: 2.4GHz WIFI / Zigbee 3.0 (for room sensors) Temperature Range: Setting Range: 32? 99? Display Range: 32? 104? Temperature Increments: 1? / 0.5? Relative Humidity(RH) Display Range: 0-99% Relative Humidity(RH) Increments: 1% Features: C-wire Adapter Included 7*24 Schedules and Flexible Routines Works with Amazon Alexa and Google Assitant Levoit's Smart Home for Comfort :connecting Levoit smart humidifiers and smart air purifiers to the thermostat with the VeSync app Supports Up to 16 Sensors 4-inch big IPS Touchscreen Automatic Brightness Adjustment Compatibility: Conventional heating and cooling systems Gas furnace Air conditioner Electric furnace Air conditioner Boiler Air conditioner Conventional cooling only system Air conditioner Heat pump systems Heat pump?No backup heat? Heat pump Electric furnace Heat pump Gas furnace Conventional Heating only system ? C-wire Required) Gas furnace Electric furnace Boiler Save Energy: With customizable routines that conserve energy when you?re away and daily energy reports, you can create a greener home and reduce your energy costs. .Operating Conditions- Temperature: 32?122F / 0?50C, Relative Humidity : 5?95% (non-condensing) Room-to-Room Comfort: Connect up to 16 Levoit sensors (sold separately) to the smart thermostat, helping you to monitor each room and pick the most comfortable temperature for you 24/7 Scheduling: Customize routines that will automatically adjust the temperature for you without the need for manual changes Control From Anywhere: Let Amazon Alexa or Google Assistant adjust the temperature at your command when you connect your thermostat to the free VeSync app Eco Level Setting: Select an Eco level to set your thermostat's energy usage and temperature precision. A higher Eco level focuses on energy efficiency, but will not control temperature as precisely Smart Scenes: Take control of your home's atmosphere by connecting Levoit sensors, smart humidifiers, and smart air purifiers to the thermostat with the VeSync app User-Friendly Touchscreen: The 4-inch, high-resolution display automatically adjusts its brightness based on the amount of light in the room, allowing you to easily view your indoor temperature, humidity, and the weather forecast Easy HVAC Monitoring: Receive notifications when there?s a system malfunction or when your indoor temperature goes outside your preferred range High Compatibility: This thermostat comes with a C-wire adapter and is compatible with Heating and Cooling Systems, Cooling Only System, Heat Pump Systems, and more. Does NOT work with heating only systems(No C-wire) or high voltage systems(120V-240V) Easy to Install: The average DIY installation takes about 30 minutes or less. Simply follow the step-by-step installation guide in the VeSync app Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.