Balance Room Temperatures: Designed to complement HVAC systems, this fan efficiently boosts the airflow of your existing AC or heater, effectively redistributing warm and cold air for a more balanced temperature; Enjoy enhanced comfort while saving energy and cutting costs Ultra-Quiet Stator-Blade PWM Fans: Features hydro-mechanical stator blades that transfer air farther even in high static pressure environments, ensuring powerful performance; The PWM-controlled motor with dual ball bearings ensures precise speed control, energy-efficiency, quiet operation and an extended lifespan Intelligent Programming: With a programmable LCD controller and high-precision temp probe sensor, this product automatically monitors temperature, and triggers fan to run at the cooling or heating temperatures you set, adjusting the fan speed accordingly; With 10 fan speeds, you can always get your desired airflow Rugged Structure & Stylish Design: Features an premium aluminum frame with CNC-machined corners and a matte-white finish; A sturdy and stylish design allows it to blend in with any decor; The thermoplastic housing protects the fans from clogging and ensures durability Easy to Install & Compact: Designed to fit perfectly into 4"×10" register holes; It can be easily mounted on wall or floor registers (not recommended for ceiling mounting). Its compact design allows it to take up minimal space while delivering optimal performance Already have an HVAC system, but still facing inefficiencies in heating or cooling your rooms? Look no further than the VIVOSUN Register Booster Fan! Simply attach it to your vents, and this product will automatically enhance the airflow from your HVAC system, effectively resolving the issue of uneven room temperatures - all at an affordable cost. With this reliable product, you can be confident in its performance. The hydro-mechanical stator blades and dual ball bearings, boasting a lifespan of 67,000 hours, ensure powerful and long-lasting functionality. The PWM-controlled DC motor allows for precise speed control, optimizing energy efficiency while keeping noise levels as low as 18 dBA at the lowest setting. Moreover, the fan's sleek, compact design, complete with a premium aluminum frame and CNC-machined corners, adds a touch of style to your home while saving space. Experience the convenience of maintaining a constant, comfortable temperature in your room by getting this VIVOSUN Register Booster Fan today. Say goodbye to temperature disparities and welcome enhanced airflow and comfort to your living space.