①. 【Large Capacity Water Diffuser】 This aroma diffuser comes with a large 400ml water tank, which can work for 6 - 10 hours. ②. 【Ultrasonic Aromatherapy Cool Mist Diffuser】 The aroma diffuser has 2 adjustable cool mist modes: continuous and intermittent. ③. 【Pure Essential Oil Electric Humidifier】 This diffuser is a combination of essential oil diffuser and humidifier. Add essential oils to the water tank to create an aromatherapy atmosphere. ④. 【7 Color Changing LED Lights】 This air aroma diffuser can be used as a night light at night. It has 7 color changing LED light colors and 2 light modes (automatic changing/fixed on one color). When you press the light button, 7 colors will be displayed - change, then press the light button again, color 1 will be fixed. ⑤. 【4 Timers and Auto Shut - Off】 This aromatherapy device has 4 different timers, namely 1 hour/3 hours/6 hours/ON (continuous operation). When the time is up, the aroma diffuser will automatically turn off. The aroma diffuser uses a smart built - in protection system. It has an auto shut - off function when the water is turned off.