100% brand new and high quality D16mm 1.7MHZ Ultrasonic Mist Maker Atomizing Transducer Ceramic Humidifier Description: Dimensions: 16mm Dimensions(With the Aprons)app:20mm Voltage:12-36V Resonant frequency: 1.7MHz Resonant impedance: 52% Static capacitance: 17005%pF Atomization quantity: 150cc/hrs The working conditions Maximum working voltage: less than or less than 60V The maximum working temperature: 85 or less 16mm is the atomization film size, ceramic is atomization film material, and the exterior material is silicone and metal. Note: 16mm diameter is to remove the size of the pastic Ring On the atomization of the film 2 wires, because the batch is not the same, sometimes red and black, sometimes yellow and blue, the other does not affect the use Size for manual measurement, there may be a 0 to 2 cm error, belongs to the normal phenomenon. And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1pc x D16mm Ultrasonic Humidifier Accessories(no retail package)