The Maison Berger's Aroma Relax Electric Diffuser Box includes the electric diffuser and a first home fragrance. The electric diffuser uses the piezoelectricity technique to spread the room fragrance without using the traditional flame of the usual Berger lamps. The diffuser is connected to the mains plug with the adapter supplied; it can also, if you prefer, be powered via a USB cable. The set also includes a first home fragrance, Aroma Relax, for a soothing atmosphere. You will be able to immediately experience the electric diffuser with this Zen fragrance, before trying other smells offered by Lampe Berger by buying different refills.