Technical Specifications: Voltage: 100-240V 50/60Hz Power: Ultrasonic Frequency: 2.4MHz Material: BPA Free Medical Grade, ABS+PP+PC Capacity: 550ml Time: >12h (High Mist), >18h(Low Mist) High Mist Output: 50ml/h Low Mist Output: 30 ml/h Noise Level: Size: 6.5 x 6.5 x 7 inches What’s in the Box: 1 x Aroma Diffuser (Model:BE550-O) 1 x Power Adapter 1 x Cleaning Brush 1 x Measuring Cup 1 x User Guide