CoolMate Personal Misting Fan Every CoolMate fan uses the most energy efficient, water resistant electric motors available in the industry Patented misting head (Nano-Mist Generator) creates a dry, microscopic mist so ultra-fine it evaporates almost immediately once in contact Advanced circuitry built-in will automatically shut mist off after 4 hours of continuous use to prevent run out of water The maximum distance for the breeze's cooling effect is up to 6 feet (1.8 meters)