Two Modes: the switch for the first time for continuous mode: the LED light is always on and the keeps spraying. It automatically shut down after 4 hours of spraying for protection. the switch for the second time to enter the indirect mode: LED flashes, sprays for 10 seconds, stops spraying for 5 seconds, and so on, it automatically shut down after 12 hours of spraying for protection. the switch a third time to turn off the machine. Installation Method: The white piezoelectric ceramic ring is the front , which is installed upward, All steel sheet is the suction on the back, installed downwards. Place the Atomizer on the of the Water and Cannot Be Placed in Water. The red wire is positive and the black wire is negative. Principle: Piezoelectric ceramic drives the metal plate to oscillate at high frequency, and ultrasonic liquid atomizes. Micrometre-sized water molecules atomize and disperse water into the air through micropores.Anti-rust Coating: of the sheet adopts an oxidation- silver layer to protect the coating process, .Widely Use: Can be used for ultra- mist devices, USB humidifier, perfume , aromatherapy and other mist devices. It has the characteristics of small size and large atomization volume.The left and right solder joints of the switch can be welded together to facilitate power supply without the need to control the switch. The waterproof glue on the wire welding points and the silver oxide layer on the of the atomizer provide additional protection, making this ultrasonic atomizer .The high-frequency oscillation system cooperates with the circuit board bracket to the amount of atomization with Micrometre aperture and form a fine mist. SPECIFICATIONS Humidifier Module Rated Voltage:DC 5V Rated Current:300mA Frequency:110KHz Power:2W Power Type:Micro-USB socket Humidifier Interface:PH2.0 terminal PCB Size:35x19mm, Weight: 4g Atomization amount:Around 40-50ml/h