Switching fragrance capsules is simple and easy, but you can also achieve the perfect ambiance by using multiple Aera diffusers in harmony. Each Aera diffuser can have its own scent. You might have two Aera diffusers with different fragrances in the same space to create a layering effect. Or you can use your smartphone to switch back and forth depending on your preference. Better yet, you can use the AeraForHome app to set up alternating schedules for each, so the scent changes automatically at pre-set times.