Key Features 3-level Flame Brightness - This electric fireplace insert is designed with 3-level flame brightness (high, medium, low) to satiate your different needs. At the same time, the realistic 3D flames provide you with ultimate visual enjoyment. Moreover, both the flame effect and the heat are able to be controlled separately.Efficient Heating - With the efficient heating ability, the 1400W fireplace heater has a high power output of 5,000 BTU, warming up 400 square foot room for a constan