How long does the scent last?

Paper fresheners typically stay potent for several weeks depending on cabin temperature and air circulation. Once the scent fades, replace it with a fresh unit.

Can I hang this on my AC vent instead of the rearview mirror?

Yes. The clip works on both rearview mirrors and AC louvers. Position it wherever airflow is strongest for best fragrance distribution.

Will this interfere with my line of sight or airbag deployment?

The hang clip is designed for minimal obstruction. Mount it to the side of your rearview mirror to avoid blocking your view. Do not block airbag sensor areas.