Serene House Zodiac White Enjoy with your favorite essential oil for therapeutic aroma benefits. Create a natural ambiance for the whole room. Reduces airborne bacteria when used with essential oils. Atomization Mode: Ultrasound Continuous Atomization Time: Approx. ≥ 4 hrs Suggested Room Size: 10 - 15m² (107.6 - 161.4sq ft) Water Tank Capacity: 90ml (3.04 fl . oz.) Product Size: L 10.4 cm x W 10.4 cm x H 23 cm ( L 4.1 in x W 4.1 in x H 9 in )