Register Booster Fan for 4" x 10" Register Holes, Manual Adjustable Louver

A closer look at Register Booster Fan for 4" x 10" Register Holes, Manual Adj

MEASURE Your Vent Size Before Purchase: ONLY Fits Standard 4" x 10" Duct Openings | Rear Casing: 3.94" x 9.61" | Dual 92 mm PWM Fans | Airflow Up to 150 CFM | Noise Level as Low as 18 dBA | USB Powered. Features a low-voltage USB power design with no complicated HVAC wiring or hardwired installation required. Simply connect to a USB adapter (not included), power bank, laptop, or wall outlet for flexible placement and easy setup. Smart Thermostat Airflow Control: Equipped with a built-in smart thermostat control and temperature sensor, the VANSHINIEER register booster fan automatically turns on and off based on your selected temperature settings. Designed to help reduce hot and cold spots throughout your home, making bedrooms, basements, offices, and other problem areas more comfortable year-round. A built-in memory function automatically restores your previous fan speed, vent angle, and temperature settings after restarting.

Manually Adjustable Louver & Closable Vent Design: Direct airflow exactly where needed with 4 adjustable vent angles (10°/30°/60°/90°) using the built-in louver controls. The closable vent outlet helps reduce dust buildup, prevents small objects from falling into ducts, and keeps vents cleaner when not in use while maintaining a streamlined appearance. Quiet 10-Speed Performance with Multiple Modes: Customize airflow with 10 adjustable fan speeds, Summer Mode, Winter Mode, Fan-Only Mode, and convenient 2H/4H timer settings. Operating as low as 18 dBA in Sleep Mode, the air vent fans provides quiet airflow support for bedrooms, nurseries, home offices, and other low-noise environments. With 4.4 stars on Amazon, it's earning solid feedback from real buyers — check recent reviews to see if it fits your needs.