This aromatherapy diffuser has transparent glass cover and PP(BPA free)reservoir, the reservoir maximize the preservation of the natural components of essential oils without odor residue, which will bring you a healthy and high-quality experience. Another advantage of the transparently glass cover and reservoir is that it is easy to monitor and fill with water. The aromatherapy oil diffuser has an auto-stop function that prevents damage to the unit due to lack of water. 【3-in-1 Aromatherapy Device】Our essential oil diffuser can be used as an essential oil diffuser/cool mist humidifier/night light. Just drop your favorite oil and enjoy the aroma diffusion while humidifying the air. Also it can as a humidifier without oils to add moisture. By spraying an ultra-fine, silky mist to soften and moisturize dry, chapped skin. Ultra-stylish ambient night light with enough light to find the bathroom at night or return safely to your bedroom without disturbing your sleep. 【Waterless Auto Shut-Off】Are you worried about running out of water for humidification in the tank and damaging the machine, or putting you at risk? The ultrasonic oil humidifier holds 120ml of water and can run continuously for up to 8 hours in low level spray mode and 4 hours in high level mode. And with the no water auto shut-off function, once the water runs out, the diffuser will automatically shut off. Ideal for relaxation, yoga, sleep or self-meditation to help you get cozy in no time.