... fog by rotating the switch to control Description for Ultrasonic humidifier : 1,Energy-saving circuitry devising; 2,From left ... to right, the rotary button, LED lights, humidifier started work.; 3,The big or small fog by rotating ... 300ML / H; 5,Activated carbon filter; 6, Automatic water cut-off protection device; Innovative ultrasonic cool mist humidifier, cool fogger mist maker for home