The Zero In Automatic Insect Killer controls flies, moths, mosquitoes and wasps in your home or in most commercial premises. The unit uses a renewable aerosol spray which is set to activate at regular intervals. Each activation delivers a measured dose of insecticide spray sufficient to treat an area of approximately 170 cubic metres. Designed to deliver cost effective insect control, the aerosol lasts up to 4 months at the lowest setting of 30 minute intervals, sufficient to control most insect infestations.