2-Piece Klein Tools Electrical and Temperature Tester Kit was designed with electricians in mind. Klein Tools MM400 Multimeter is an auto-ranging multimeter that measures AC/DC voltage, AC/DC current, and resistance. Klein Tools IR5 is a professional dual-laser targeting infrared thermometer, offering a wide measurement range, a tight 12:1 distance-to-spot ratio, dual targeting lasers, and several calculation modes to facilitate different temperature measurement applications. For more than 160 years, Klein Tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right. Our family of engineers, workers and craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. Klein isnt just the name of our company, its also our family name. And since were an American company thats family-owned and family-run, you know you can count on us to be here tomorrow. Klein Tools doesnt just make great products, we make great products that stand up to the demands of the professionals who use them every day ... Since 1857.