100ML Aroma Diffuser Humidifier Air Freshener Grain Wood Essential Oil Diffuser Humidifier With 2 Interchangeable Tops for Home, Office Ultrasonic Aromatherapy Diffuser instantly vaporises water and essential oils to produce a beautiful fragrant mist to lift your mood, relieve stress, or remove unpleasant odours from the air. Seven built-in colour changing LED's with two brightness settings. Constant colour mode or automatic changing mode. Large 300ml capacity provides 16+ hours of runtime with an Auto shut-off feature for safety when water runs low. Ultra-Quiet Technology and Energy-Efficient Design for peace of mind.