Features: Quantity: 2pcs Specification: 20x1.2mm (as picture shown, ceramic disc diameter is 20mm (not include rubber ring)( with ring diameter is 25mm) Resonant frequency: 1.70MHz Resonant impedance: <2 ohm Coupling factor: > 52% Static capacitance: 1800pF Atomization quantity: <380ml/h Package includes: 2 X D20mm Ultrasonic Mist Maker Fogger Water Fountain Ceramic Humidifier

Package Includes: 2 X D20mm ultrasonic mist maker fogger water fountain ceramic humidifier. Coupling factor: > 52%; Static capacitance: 1800pF; Atomization quantity: < 380ml/h. Resonant frequency: 1.70MHz; Resonant impedance: < 2 ohm. Specification: 20x1.2mm (as picture shown,ceramic disc diameter is 20mm (not include rubber ring)( with ring diameter is 25mm). Made of high quality material which is durable and long time to use.