Klein Tools Electrical Test Kit includes two tools: an outlet tester and a non-contact voltage tester. The outlet tester checks for proper wiring and correct voltage from 12 to 100V AC, ensuring outlets are functioning safely. The non-contact voltage tester detects AC voltage in the range of 70 to 1000V, allowing users to check circuits without making direct contact. The kit is powered by two AAA batteries and is designed for easy, quick electrical testing, providing an essential toolset for electrical maintenance and troubleshooting.