OY-2: adopts the design of secondary plug, Fits all electric outlets. It works when plugged into power outlet , and take out to replace the essential oil at any time. Small in size and but large in capacity. It also adopts two-fluid atomization technology, The scent particles molecules diffuse into the air evenly; Built-in human body induction mode, intelligent fragrance; Multiple Working intensity Level adjustment, the fragrance concentration is arbitrary, let you enjoy a comfortable fragrance environment Features: 1. Plug and play Fits all electric outlets 2. Built-in Human Sensor 3. Multiple Working intensity Level Adjustment 4. Small Size but Big 130ML bottle 5. Cold Air Diffusion