Home Radon Test Kit (2-pack) D.I.Y. short-term radon test includes: 1 test device & 1 QA/QC device for side-by-side use. Cost includes analysis & return mailer with prepaid label for return to RAdata, Inc. Laboratory. For use by home owners in residential buildings (Not for testing Schools, Daycares, or buildings not owned by the tester). If you have placement questions, refer to the instruction sheet or call us at 800-447-2366. Follow directions, fill out information sheet and return the entire kit to us for analysis at no additional charge.