scopow smart register booster fan for 4" x 10" vent holes - 10-speed quiet vent booster fan with thermostat & remote control, improves heating/cooling, manual adjustable louver, for floor wall ceiling white is up for auction in Home & Kitchen. The current bid is $1.00, 97% below the $35.99 MSRP, in As Is condition. This auction has ended — similar items appear in live auctions regularly.