10 Electrical Receptacle Tester AC Outlet Plug 3 Prong Circuit Analyzer GND Open

Brand: QNP RRG * Simply and safely detect ungrounded lines and disconnected or interchanged neutral and hot wires. * Detects faulty wiring condition in 3-Wire 110-125V AC receptacles. * Instantly diagnoses plugs--Indicators light up when unit is plugged into the wall. * Important when using hi-tech equipment such as computers, stereos, and TVs. * Tester indicates: Open ground, open hot, open neutral, hot/ground reverse, hot/neutral reverse and correct. * This listing is for 10 pieces.