GFCI Outlet Tester Klein Tools - Electrical Outlet Tester The Klein Tools GFCI Outlet Tester is designed to detect the most common wiring problems in standard and GFCI receptacles. It helps electrical distributors, lighting solution providers, wire and cable specialists, and switchgear suppliers verify wiring conditions quickly and accurately. The tester features a convenient chart that indicates wiring status based on illuminated lights, identifying issues such as open ground, reverse polarity, open hot, open neutral, and hot/ground reversed conditions. Specifications Type: GFCI and Standard Receptacle Tester Application: Determine Wiring Condition in Outlet Voltage: 110/125V AC at 50/60Hz in 3-Wire Outlet Drop Protection: 6.6 ft (2 m) Standard: CAT II 300V Overall Height: 1.625 in Overall Width: 1.875 in Product Weight: 0.1230 lb (approx. 1.9 oz) Manufacturer Part #: RT210 Features Detects common wiring problems including open ground, reverse polarity, open hot, open neutral, and hot/ground reversed Includes a built-in chart for easy interpretation of wiring conditions based on light indicators Confirms operation of ground fault circuit interrupters (GFCI) with a test button Compact, portable design suitable for use by electricians and electrical distributors Meets UL and CSA safety standards for electrical testing equipment Downloads & Links Instructions Spec Sheet