Timer function: Short press the timer off button to set 30 minutes, 60 minutes, 120 minutes, and the corresponding LED light be on for a long time after shutdown. The LED light automatically turn off. Aromatherapy Diffuser Machine: Having an 200ML water tank capacity, the aroma diffuser can last for up to 8 hours of continuous use. You can also add your favourite taste of essential oil so as to enhance the ambience around you. Please note: It is important not to fill in an excessive amount of water which beyond the max. level line. The white noise machine is made of 8 different noise effects. The 8 sounds effects are: Rain, water, birds, waves, ringtones, alpha waves, insects, piano. Cozy Night Light Modes: The upper soft light comes from the outlet with the mist and creates a vivid flame-like romantic atmosphere, while the underneath warm night light helps to strengthen it. Plus the turned on background noise, all these are offering you a good sleeping and working companion. Built-in Speaker: Apart from the 8 white noise effects that come with the aroma diffuser itself, you can also connect the machine with your own device and play your favourite music or podcast, enjoying the most out of your ! Moreover, it is an excellent gift choice to make or friends.