Our pocket diffuser is a 3 1/2" x 2 1/2 " battery operated, portable unit that utilizes a fan to disperse the essential oils. Take this innovative and discreet diffuser with you anywhere you go - so slim and trim that it slides right into your purse or pocket. You can enjoy the true aromatherapy benefits of Aura Cacia's 100% pure essential oils while you wait for the bus, sit at your desk or even attend a crowded concert. Insert AAA battery into the pocket diffuser. Apply 5-15 drops of your favorite Aura Cacia 100% pure essential oil or blend onto the pocket diffuser refill pad and insert into the diffuser. Push the button and enjoy true aromatherapy benefits. A refill pad may be used until it hardens. For best results, use a new refill pad when switching oils.