Usage Tips:make your car more fashion, personality, unique aroma and enjoy driving. Smooth Surface, Strong Magnetic Closure, Long Lifetime.absorb essential oil easily and Diffused fragrance. Relieve Your Stress and Keep Alert: When you drive, the aroma surround you, bring you sober and good mood. Droping your favorite essential oil in the diffuser felt pads to enjoy your driving, daily life and trip. Portable Car Diffuser: It doesn't need to charge. Also it doesn't require a filter or to put water in it either. Conventional air fresheners will cause health concerns with synthetic chemicals, but the essential oil diffuser will not. Widely Used: Apply a few drops of your favorite essential oil to the felt pad, put it inside the 30mm car locket. Easily to clip on car air-conditioning vent, place it on office desk, use it at home or any other proper places that you prefer. colour:Silver Material:stainless steel size:30mm in diameter (1.18 in) Felt pad size: 22mm in diameter Package Contents: 1X car aroma diffuser 10X Felt Pads (Random colors) Random colors cannot be selected Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.