Photo 1 of MESTEK Outlet Tester with GFCI - Electrical Receptacle Tester with LCD Digital Display, Outlet Socket Checker for Standard 3-Wire 120V Electrical Receptacles, Detects Common Wiring Problems

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Photo 1 of MESTEK Outlet Tester with GFCI - Electrical Receptacle Tester with LCD Digital Display, Outlet Socket Checker for Standard 3-Wire 120V Electrical Receptacles, Detects Common Wiring ProblemsPhoto 2 of MESTEK Outlet Tester with GFCI - Electrical Receptacle Tester with LCD Digital Display, Outlet Socket Checker for Standard 3-Wire 120V Electrical Receptacles, Detects Common Wiring Problems