Lasts 30 days. Fragrances that change your world. A new generation air freshener that looks good and works continuously to leave rooms smelling fresh and clean. Wizard Crystal' Air Freshener contains a unique concentrated fragrance gel that releases a pleasant fragrance for 30 days. It's perfect for large rooms. The fresh, clean smell of lavender evokes feelings of calm serenity and an aura of luxury. Soft floral tones, warmed by the sun, create a naturally inspired sensation.