Amucolo 11.54 in. Register Booster Fan Auto-Fan Speed Adjust with Thermostat Control AC Vent Booster Fan Wall Fan in White

The Register Booster quietly boosts heated or cooled air to a room to improve circulation and comfort. This register booster features a built-in temperature sensor and works automatically with forced air systems. It is a simple, energy efficient and safe solution for rooms that are too hot or too cold.