Our Ceramic Diffusers use ultrasonic technology to deliver a fine mist. Your chosen Urban Sun essential oil is diffused throughout your space without the need of heat, which makes it a safe option to use around children and pets.. 100ML Capacity 7 different LED light options - all with the option of dim or bright 2 mist mode options - continuous mist (4 hours) or Intermittent mist (30s ON, 30s OFF) Automatically turns off when water runs out Approximately 17cm h x 9cm w Ceramic cover, BPA free plastic water tank CITRUS 10ml - Our Organic CITRUS blend has a fresh citrusy aroma that promotes a positive and invigorating atmosphere.