From the ManufacturerAccording to data from the U. S. Fire Administration, there are an average of 40.3 tree fires per day in the U. S between December 1-January 7. Coleman Cable's Safe Tree cord helps reduce the chances of a fire. The internal sensor can detect when a tree is being tipped over and immediately cuts the power to the lights. The unit includes a fasterner that securely holds it to the tree trunk, so no one but you will even know that it is there.