?? For 250 days ?? Uses a three-dimensional cross-link mesh ?? The three-dimensional structure expands the surface area of ??the mesh, and even a slight air flow causes the chemical particles to volatilize, causing the chemical to diffuse widely. ?? Odorless Specifications ?? Applicable pests: Chironomus, Psychodidae ?? Active ingredient: Pyrethroid drug ?? How to use: 1 at the boundary between indoor and outdoor