At a mid-strength setting (5 on Aera and 3 on Aera Mini) playing 10 hours a day, on average, capsules last approximately 60 days. Fragrances may vary and days may vary based on how many hours they are scheduled to play each day. The best way to conserve fragrance and make capsules last is to make sure your Aera or Aera Mini is connected and scheduled to turn off when you are away at work or at night when you are asleep.