his air freshener dispenser brings you the fragrant air automaticly by timer. You can set the spraying fragrance frequence-spray interval time from 1 to 60 minutes. Interval spray time and working mode can chosen at your preferring fragrance level; Three working modes are available among Monday to Friday, Monday to Saturday, and Monday to Sunday, working period can be set from 12:00am to 11:59pm, for example 8:00am(starting time) to 6:00pm(stop time).