The IDEAL Electrical 61-502 120V AC GFCI Receptacle Tester is a handy tool designed for testing the functionality of ground fault circuit interrupter (GFCI) receptacles. The 61-502 is specifically built to work with 120V AC power systems. This tester features easy-to-read indicator lights that provide clear and instant feedback on the status of the GFCI receptacle being tested. With this the 61-502, users can quickly and reliably check if the GFCI receptacle is functioning properly, helping to ensure electrical safety in both residential and commercial environments.