This type uses the diffusion electricity of your car vent to disperse the oil aroma in the air. You will discover holes around the again side with the metal clip and In the locket type clip is space for the circle scent pad. The scent pad retains the essential oil https://automobileessentialoildif08764.blogunok.com/28137563/car-essential-oil-diffuser-things-to-know-before-you-buy