The diffuser's adjustable metal grill allows you to control the intensity of fragrance in the car. Each insert lasts for up to three months after opening, as long as the container is properly closed after each use. When used continuously, each insert will last for 40 hours, with up to 80 cycles of scent diffusion (1 cycle is equivalent to an hour, alternating between 10 minutes of scent diffusion and 10 minutes' pause).
