3-in-1 functions: aromatherapy diffuser, humidifier, night light. 4 timer settings: the essential oil diffuser can work for up to 8 hours continuously or 10 seconds. In intermittent mode, it takes 2-4 hours. Quiet: < 36dB. This portable diffuser can be used in the bedroom, living room, children's room, restroom, office, yoga room and other places. The 7 Colors Essential Oil Diffuser Night has 7 soothing colors and each color has 2 light options (intensity and brightness). The soft light creates a soothing and romantic atmosphere. Place it in your child's bedroom and use it as a nightlight for a restful night's sleep. Advanced ultrasonic diffusion technology generates vibrations at a frequency of 2.4 million times per second which dissolves water and essential oils without using heat in extremely fine micro-particles.