The First Alert Radon Gas Test Kit checks your home or office for radon, a naturally occurring but dangerous gas. Simple to use and listed with the EPA, the kit includes everything you need, including lab fees (except NJ state tests), recommendations, and next steps if you do detect radon. Safe and easy to use, this radon testing kit is recommended for use only within the United States. The charcoal-based radon test kit is listed under the EPA Radon Gas Measurement Proficiency Program. Simple test takes just minutes. When finished, place the test in the provided envelope, apply postage, and mail it to the lab. Lab results are available three to five business days after lab receipt. Includes next steps and recommendations.