Automatic end of life indicator Kills moths, eggs & larvae safely Will not stain Complete protection for total peace of mind Acana Hanging Moth Killer & Freshener uses the latest technology to provide long-lasting protection from moths, their eggs & larvae. Additionally, the lavender perfume with natural oils, freshens continuously. Each unit last up to 6 months* and has an automatic end of life indicator, to confirm in real time, when it must be replaced. *Dependent on area, temperature and airflow. The active ingredients are sealed away in a specific plastic holder, which controls its diffusion for consistent performance, whilst avoiding any direct contact with clothes or hands.