This test kit offers a quick and accurate radon level of your home or office. The kit includes 2 short-term radon gas detectors that can be used at the same time and location. The 2 test detectors satisfy real estate transaction requirements. Safe and easy to use. Meets all EPA and state requirements. Detects the invisible and odorless gas. Standard lab results within 1 week. Prepaid postage envelope included in kit. $35.00 standard lab analysis.