This ZAQ Swirl Best Aromatherapy Ultrasonic Oil Diffuser, which lists for $59.99, drops from $19.99 to $18.99 when you apply our code BRADSDEALS at checkout at Tanga. Shipping is free. This is the lowest price online. This diffuser emits soft light. It operates up to seven hours, and it is 240ml. It is 6.3x6.3 inches. Sales tax is charged in most states.