White, 4-By-10-Inch Register Hole-Fitting Quiet Ac Vent Fan With Thermostat Product Details Quiet Smart Vents: A fan system designed to improve wall and floor airflow in HVAC systems, bringing convenience to your life. One-touch heating/cooling control: With heating and cooling thermostats to coordinate the temperature of each room. The fan speed is adjustable from 1 to 10, and the LCD screen is clearly displayed. Simple installation: 4 x 10 inch registered booster fans X1, power adapter X1 are prepared for you, plug and play, the easiest and the best. Rugged Case: Custom made premium aluminum case, painted with a matte finish that is sturdy and good-looking. Product Warranty: To provide you with a lifetime warranty of the product, you can contact us if you have any questions. 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.