NuTone Haven Backyard Mosquito Repellent System. This kit contains: 4 fixtures, 4 repellent cartridges, 1 low-voltage wire, 1 controller. Repel Mosquitoes All Season Long*. Effective protection against all types of mosquitoes. Safe for people, pets, plants. Repellent is odorless, and leaves no film or sticky residue. Reaches optimal performance within 15 minutes of activation. Kit covers a 440 square foot area (each fixture covers 110 square feet). It's as easy as turning on the lights to say goodbye to mosquitoes. Installs in 2 to 3 hours. Durable construction. Backed by a 30-day satisfaction guarantee. *Assumes season as 90 days/average use 2.4 hours per day.