Specifications:• Input voltage: AC100-240V 50 / 60Hz• Power: 12 W• Ultrasonic frequency: 2.4 MHz| Volume: 500 mlSimple Operation:1. lift the cover; Fill the water tank.2. Add 3-5 drops of aromatherapy / essential oil if you want.3. Connect the humidifier to the power supply and press "fog" to choose the desired mode.