Automatic end of life indicator Kills moths, eggs & larvae safely Will not stain Complete protection for total peace of mind Acana Sachet 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 sachet lasts up to 3 months*, is individually foil sealed and has an end of life indicator, to confirm in real time, when it must be replaced. *Dependent on area, temperature and airflow. The active sachet is individually sealed in a special ventilated material, which controls its diffusion, to give consistent performance, whilst avoiding any direct contact with clothes or hands.