A fog machine, fog generator, or smoke machine is a device that emits a dense vapor that appears similar to fog or smoke. A metal diaphragm vibrating at an ultrasonic frequency creates water droplets that silently exit the Ultrasonic Atomizing Transducer in the form of a cool fog.
professional entertainment applications
Water lack protection
Changeable piezoelectric ceramic
Metal shell, and waterproof
Highly vast fog output volume