The Southwire 20025K Clamp Meter Electrical Test Kit provides everything you need to perform basic and advanced electrical testing and energy audits on the job or around the house. Combine the clamp meter and AC line splitter and you can measure how much current appliances are using. Helps save energy and prevent unnecessary tripping of circuit breakers. The 21005N clamp meter has 6 useful functions. It measures AC and DC voltage up to 600V and AC current up to 200A. Also measures resistance, diodes, and checks continuity. The 21005N clamp meter is compact and easy to hold in the hand. It's built tough too and will withstand a 6.5-foot drop. The 60040A AC line splitter is the perfect companion to any clamp meter. Plug the line splitter into an AC outlet, then plug an appliance… like a toaster, hair tryer, or air conditioner into the line splitter. Then use the clamp meter to measure how much current the appliance is using. It's practically the only AC line splitter that's UL listed so you can be assured it's designed to be safe. The 40022S outlet tester is Southwire's 3th generation design. You'll find it to be better built than any other outlet tester on the market. The pins are reinforced and the colored lenses won't break or pop-out when dropped. Use the GFCI test button to check GFCI circuits in kitchens and bathrooms. Kit includes 21005N 200A CAT III clamp meter, test leads, 2 AAA batteries, 60040S AC line splitter, 40022S GFCI receptacle tester, and instruction manual