WHOLESALE 7 PIN CONNECTION TESTER WITH LED Takes the guess work out of connecting trailers. Designed with heavy duty nylon housing, and bright LED indicator lights that typically have a lifespan of 10+ years. Tests 6 seperate trailer light functions. ⚠ WARNING: This product can expose you to Lead, DBP,CD, BPA ,hexavalent chromium, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.