Great scent for kitchens & baths. Eliminates odors in air caused by bacteria. Alternates for lasting freshness. Contains 1 alternating scented oil warmer and 1 dual scented oil refill. Automatically alternates throughout the day so you don't get used to the same scent. Freshness you notice for more than 30 days (on low). 1. Soft green lights indicate which scent is working. 2. Adjustable intensity control. 3. Two complementary scents. 4. Plug rotates to fit outlet. UL listed. Refill made in USA.