The Klein Tools 3 Piece AC/DC Voltage Outlet Tester Electrical Test Kit ET45KIT3 is a reliable and comprehensive tool for testing electrical outlets. This kit includes three pieces and is designed specifically for Klein Tools brand compatibility. The main function of this test kit is to measure AC voltage, making it a crucial accessory for various electrical testing tasks. With a compact size of 14 inches in length and 6 inches in width, this kit is convenient to use and store for both professionals and DIY enthusiasts.