Discover the magic of automatic freshening with Airwick Freshmatic. Just insert the refill and batteries in the device and set the timer. It releases bursts of pleasant fragrance automatically to keep your home smelling fresh and fragrant all the time. The time settings help you control the fragrance intensity as you desire. When refill is about to be over, the light indicator inside the device flashes and reminds you that it is time to change the refill. Each refill delivers 25 times more spray than an ordinary room freshener and lasts 55 days at low fragrance intensity setting.