The Klein Tools ET310KIT is a comprehensive professional-grade diagnostic solution designed to quickly and accurately identify the correct circuit breaker in a panel corresponding to an electrical outlet or fixture. This high-performance kit eliminates guesswork and reduces downtime during electrical maintenance or troubleshooting. Operating on 90-120V AC circuits, the receiver provides clear visual and audible indicators when the matching breaker is found. The integrated GFCI outlet tester on the transmitter ensures that wiring conditions are safe and compliant, while the included accessory kit allows for seamless testing of bare wires, light fixtures, and non-standard outlets.Performance Features Precision Identification: Quickly locates the correct circuit breaker in a panel without the need for manual trial and error. Integrated GFCI Tester: The transmitter features a built-in GFCI tester to inspect wiring conditions and verify the operation of ground fault circuit interrupters. Extended Versatility: Includes the 69411 Accessory Kit with a light socket adapter and alligator clip lead for testing non-standard fixtures and bare wires. Rugged Durability: Built to withstand professional job site conditions with 6.6-foot (2 m) drop protection. Intelligent Power Management: The receiver includes an auto-power off feature to conserve the 9V battery life after 3 minutes of inactivity. Organized Storage: All components are housed in a premium hard carrying case with a custom-fit foam insert for maximum protection. Technical Specifications Specification Details Voltage Range 90 - 120V AC Frequency 50/60 Hz Safety Rating CAT II 120V Drop Protection 6.6 ft (2 m) Indicator Type Audible Beep & Visual Green/Red LEDs Material PC & PC-ABS Housing, Electronic Components Dimensions 10.96" L x 2.16" H x 1.39" W Pollution Degree 2 What's Included ET310 Digital Circuit Breaker Finder (Receiver & Transmitter) 69411 Accessory Kit (Light Socket Adapter, Alligator Clip Adapter, 3-Prong to 2-Prong Adapter) 9V Battery (for Receiver) Premium Hard Carrying Case with Foam Insert User Manual