Electric fireplace insert provides up to 5,386 BTU/1,500W and warms up to 1,000 square feet (heats larger rooms) 6-level temperature setting; 4 levels of flame brightness LED-lit flame operates with or without infrared heat; realistic-looking lighted embers with 3 color options Option for placing faux glass crystals or stones (included) Timer function with programmable ranges from 10 minutes to 9 hours Overheating control device Remote control with LED display Power cord included; UL Listed Assembly required