1. Mist volume can be adjusted by manual; 2. Ultrasonic principle, can produce negative ion, more healthy; 3. Auto-protect, when waterless, more safe; 4. Coverage area is : 20-30m2 5. In case of dry skin in Summer or in Winter; 6. On-off indication light. Produce size: 23*13*26CM Gift box size: 21*20*30CM 8PCS/CTN Carton Size:61.5*57*42.8CM N.W.:0.9KG G.W.:11KGS(A CTN) 1752PCS/20GP 3512PCS/40GP 4968PCS/40HQ.