Spa-Pro Aromatherapy Diffuser - Large capacity reservoir holds 600ml of water for 10-18 hours of operation. Adjusts for either low or high mist output. Offers a soothing, ambient mood lighting. Portable water tank for easy refilling. Safety system: automatic shut off when water is empty. Add liquid aromatic scents to the water for therapy needs (optional). Offered in an imitation white oak finish. For use in therapeutic atmosphere or home use.