Check the listing for details. Klein Tools RT110 Receptacle Tester. Condition: New. Listed at 11.79 USD. Klein Tools RT110 Receptacle TesterKlein Tools RT110 Receptacle Tester detects the most common wiring problems in standard receptacles. Conditions indicated: wiring correct, open ground, reverse electrical outlet, open hot, open neutral, hot/ground reversed. Conditions not indicated: quality of ground, multiple hot wires, combinations of defects, reversal of grounded and grounding conductors.Outlet tester's light sequence on receptacle tester indicates correct/incorrect wiringReceptacle tester conforms to UL Std 1436, Certified to CSA Std C22.2 #160Operating temp: 32-degrees F to 140-degrees F (0-degrees C to 40-degrees C)Built to withstand a 6.6-foot (2m) dropNominal Voltage: 110/125V AC at 50/60Hz in 3-wire outletDesigned to detect the most common wiring problems in standard receptacles