Saillong Smart Quiet Register Booster Fan With Intelligent Thermostat, 160 Cfm Product Details [Quiet Vent Fan Booster System]: the smart register vent is featured with dual ball bearings which has hydro mechanical stator blades, quiet PWM motor, and built in sponge, make air to travel farther even in high static pressure environments while reducing the noise of air vent fan under 16Dba [Smart Control]: the smart register vent fan comes with a probe on the back, features thermal detection function, which can push vent fan to run for both cooling and heating temperatures you have set, and also you can press the speed button to change the fan speed and determine the level of airflow boosting, enjoy your comfortable indoor temperature [Quality Materials]: the white smart register vent is consisted of anodized aluminum frame and thermoplastic casing with fan cover, wear resistant and durable; The inner of the AC vent fan contains dual ball bearing, ensure our AC vent booster fan has longer lifespan, about 67000 hours [Professional Design]: the air vent booster fan is designed with clear LCD display, with 3 control buttons for easy operation; Also the vent fan booster is equipped with extra 12 feet power adapter cord, long enough to connect air vent cover and power supply that connect far away [Only Fit 4 x 10" Register Holes]: please notice the register vent fan only fits 4" x 10" registers, easy to install directly into the register hole on the wall, floor or ceiling at home 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.