400ML CAPACITY. The cold air diffuser has a capacity of 400ml, there is no need to add essential oils frequently. WIDE COVERAGE. The scent air machine can cover an area of 2000 square feet, allowing you to have a full range of fragrance. BLUETOOTH CONTROL. The waterless diffuser for large room can be controlled only by Bluetooth, and you can adjust the date, set a specific time point, and the frequency of fragrance spraying. The design without buttons on the outside makes this hotel collection diffuser machine more fashionable and beautiful. INSTALLATION METHOD. The arrival is a complete cold air diffuser that does not require assembly. You only need to take out the essential oil bottle inside and put in the essential oil of your favorite flavor, and then you can smell the flavor you like after powering on. IMPORTANT. The smart aromatherapy machine cannot be used with water-soluble essential oils, and essential oils with too high concentrations cannot be used normally. If you encounter a situation where the machine cannot be used normally, please first check whether the essential oil you are using is compatible. MACHINE MAINTENANCE METHOD. Clean the intelligent scent air machine once a month with 90 percent or higher alcohol. This can effectively extend the life of the diffuser and prevent the diffuser from being clogged by solidified essential oils, which can reduce the diffusion rate of the aroma or cause the machine to stop working. SPECIFICATIONS. 12V, 5.75W, Weight: 0.74KG, Material: ABS. PACKAGE INCLUDED. Bottle, screws, instructions, plug, adhesive hook, a pipe to connect the air conditioner. If you do not understand how to use the parts inside, you can also contact us, and we will provide you with a detailed explanation. Please rest assured to buy.