If you already own a Sobe Plug-In Diffuser, you are eligible for a 10% discount on all Aromas purchases. If you subscribe for a 6-months subscription, you will receive a free Sobe Plug-In Diffuser with a 10% discount and free shipping on your first order. If you subscribe for a 3-months subscription, you will receive a 10% discount and free shipping on your first order.