motctqvd smart register booster fan fits 4" x 10" register holes, 10-speed quiet vent fan booster, smart thermostat control for improves heating and cooling with remote for floor or wall vents 4" x 10" white is up for auction in Home & Kitchen. The current bid is $2.00, 95% below the $39.99 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.