1. Automatic power off when water was lacked, perfect protection for family 2. Spa stick Spray Nozzle, home use facial spa. 3. Flat spray nozzle, muti nozzle muti working mode. 4. 4 Layer filter helps clean the air. 5. Very low noise, no worry about disturbing sleep. 6. Huge water tank, the water tank can hold up to 2,700 ml water. 7. Adjustable fog volume, the volume can be adjusted to suitable ones.