Klein Tools' ET270 Is An Auto-Ranging Digital Multi-Tester That Measures Ac/DC Voltage, Resistance, Continuity, and Performs A Battery Test. It Also Tests Wiring Conditions In Standard 120VAC and Gfci Electrical Receptacles and Inspects North American Gfci Devices. Comes With Right-Angle Test Leads, Receptacle Test Cord, Instructions, and All Required Batteries.