1. Using New ultrasonic technology, our diffuser operates quietly, producing sound levels below 18dB. The soft trickle of water creates a calming ambiance that surpasses any white noise machine, allowing for uninterrupted sleep or focused work. 2.The diffuser is perfectly sized to fit in a car cup holder, and the USB cord hole is positioned conveniently. Included 1-meter USB cord is compatible with most vehicles. 3.Setting it up is very simple: just add water, then press once for continuous mode, twice for intermittent mode, and press a third time to turn it off. 4.Ensure your adapter power is more than 1 amp., Check that you are adding water below the maximum line. If the product is used for extended periods, clean it with a soft cloth every 2-3 days.