Will this work with my vehicle's air vents?

The vent clip is designed for standard horizontal or vertical vent slats. Test the fit before fully seating it—if your vent design is unusual, you may need to use adhesive backing as an alternative, but that's not included here.

How long does one cartridge last?

Weeks of continuous use depending on cabin temperature, ventilation, and how often you run the AC. Once the scent fades noticeably, the cartridge is spent and ready to replace.

Can I use this if I have leather seats or special cabin finishes?

Yes. Since it's a solid cartridge mounted on a clip, it won't drip, stain, or off-gas onto leather, suede, or plastic trim like liquid fresheners can. Just keep it away from direct sunlight to avoid warping the clip.