5 pcs air freshener vent clip, each clip with a fragrant ball inside. You can use your favorite essential oil to refill the ball, and then clip it on the air vent. Fragrant ball for car vent clip, hanging fragrance ball design, air outlet fragrance, driving safety, and environmental protection. Car air outlet clip, hanging fragrance ball design, air outlet fragrance, driving safety, and environmental protection. It can be used repeatedly for a long time after being filled with essential oil. Aroma diffuser locket, you can clip it to the car air outlet, bedroom, bathroom, study, office, and other places where you need to use it to diffuse fragrance.