Features: 1. Non-toxic and chemical-free, no artificial scents. 2. Purify the air, reduce harmful gases. 3. Made of high-quality aviation aluminum alloy, sturdy and durable. 4. Unique regulation mechanism to control fragrance release. 5. Easy to install, no battery needed. 6. Package includes 1 piece aroma stick and 5 perfume fragrances. Note: Keep away from seats, objects, and children.