Double safety protection device, one is overheat protection device, automatically cut off when thetemperature is too high, the other one is fuse. 1400W heat/ 5000 BTU's per hour provides supplemental heat up to 400 Sq. ft. 11 temperature settings : 64F -82F,ON meas heater keep working;Timing function can set the time from 1 to 8 Hours. 50000 Hours life time LED light source;Realistic flame effect with or without heat. Install it into a TV stand, fireplace cabinet( But be aware of the right size of furniture)or use it freestanding. Two-button operation, simple and safe.