Vent Booster + Vent deflector: Cool Air Booster to All Rooms NEW! Dramatically increases your existing airflow speed & circulation- NO batteries. NO electric! Neutral off-white. Feel a smooth, silent jet stream of warm or cool air 12+ ft across your room. Great demo video on www.VentTurbo.com! Magnetically attaches instantly over any standardized existing steel ceiling, wall, floor vents. Fully directional nozzle directs warm or cool air where YOU want it. No assembly. No batteries. No electric- and ONES SIZE FITS ALL flush mount steel vents up to max 18-inches in width! May save energy used on fans/ heaters.