4-Piece Klein Tools Electrical Test Kit was designed with electricians in mind. The Digital Multimeter measures DC current, AC/DC voltage and resistance. Non-Contact Voltage Tester Pen automatically detects standard voltage in cables, cords, circuit breakers, lighting fixtures, switches, outlets, and wires. Receptacle Tester detects the most common wiring problems in standard receptacles. The Infrared Digital Thermometer with Targeting Laser as a wide measurement range of -4 to 752-Degree Fahrenheit (-20 to 400-Degree Celsius) and a 10:1 distance-to-spot ratio.