Tower Fans by LEVOIT. Details:1. Illustration of Each Mode Normal Mode: This is the default mode. Use it to set the tower fan as you like. Auto Mode: With a built-in sensor, the fan speeds change by room temperature. Turbo Mode:Used for quick cooling and air circulation, it starts at the highest speed plus oscillating. When the room temperature decreases, the fan speed decreases accordingly. Then the fan speed changes by room temperature. Advanced Sleep Mode: The display and sound will automatically be off in 5 seconds. a) Within the first hour, the fan does not oscillate. The starting fan speed is determined by your current fan speed when you select this mode. b) After one hour, the fan oscillates and decreases speeds - to keep you from getting cold from the constant wind. c) Then the fan speeds will change by temperature, giving you a comfortable night experience. 2. Troubleshooting If the fan suddenly starts to oscillate, It is normal when the fan is in Advanced Sleep Mode. It...