Amprobe PK-110 Electrical Test Kit with Voltage Probe Residential electrical test kit includes AM-420 Digital Multimeter, VP-1000 Non-Contact Voltage Probe, ST-102B Socket Tester with GFCI and all required batteries Kit contains tools to measure voltage up to 250V AC/DC, DC current and resistance, and battery tests Check for presence of voltage in receptacles, switches, extension cords and light fixtures Verify proper wiring of GFCI (ground fault circuit interrupter) and standard US and Canadian wall outlets with a simple push of a button CSA listed for safety