Panasonic F-PXJ30AHS - Air Purifier 

Turbo ModeWhen the function is activated, the indicator will be turned on and the clean sign will blink in red and blue. After 10 minutes, the turbo operation will return to the previous speed setting.
Sleep ModeOperate in low speed with display off or dimmed for 8 hours and turn off automatically.
Auto ModeThe appropriate speed will shift automatically according to the pollution level.
Clean SignThe dirt sensor detects dirt in the air and notifies with the clean sign.The clean sign can be switched off by pressing the button of [Sleep(8h)] and [Air Volume] simultaneously for about 3 seconds.
Filter Replace IndicatorIt will remind you to replace the filter when it reaches its lifetime.