Upgraded Digital Non-Programmable Thermostat For Home 1 Heat/1 Cool Single Stage Product Details It's non programmable conventional thermostat: single stage, 1 heating and 1 cooling, electric or gas/oil configurable. (TIP: before purchasing, check to see if this thermostat is compatible with your old thermostat.) for with Conventional Single-Stage Heating (Gas/Oil/Electric Furnace), Ventilation, and Air Conditioning. ?Does not work: Multistage Heating Air Conditioning, and HVAC Central Air Conditioner Heat Pump System? Not Compatible with the following systems: HVAC Central Air Conditioner Heat Pump System( with Aux or Emergency heating), Multistage Heating Air Conditioning, 3-wire Hydronic (Hot Water), Dual Fuel/Hybrid Heating, Mini Split Air Conditioning Systems, and 120/240V Electric Baseboard and Line Voltage systems, Convectors, Radiant Ceiling Heat, RV Thermostats. Easy to read and use: Large digital display with large characters and blue backlight. separate buttons for easy setpoint temperature, very suitable for middle-aged and elderly people to use. Upgrade function: The thermostat with humidity and temperature monitor to ensure you?re always aware of changes in your home environment. It gives precise temperature control with +/- 1 degree in Fahrenheit and Celsius for ultimate consistent control to keep you comfortable. Easy installation and the battery is easy to replace, with dual powered by 24VAC power or 2 AAA batteries, C-wire is not required. built-in low battery reminder, compressor delay protection and more. Please contact us at once if any quality problem, come with 2-years warranty and 24h customer service. 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.