Wholesale Viennese Aroma Diffuser - Bluetooth Speaker is timeless and elegant, it provides a flameless and smoke-free way to fragrance your room or office. Just add some water and a favourite essential or fragrance oil for an instant aroma experience. It uses ultrasonic waves to instantly vaporise the water and essenstial oil in the tank to create a cool dry fagrant mist. Tank Capacity: 300 mlLED light: 7 coloursPowered by USB ( length of the cord 100 cm)Auto power off when water runs outTimer: 2,4,8,16 hHeight: 15 cm, Diameter 15.5 cm, Weight 350 gTo be used with essential oils mixed in water only!  -Size: 15.5x15 (cm) -Parts: plastic