The RT250KIT is a Premium Electrical Test Kit from Klein Tools. It includes a GFCI Receptacle Tester with an LCD display for voltage and wiring faults, and a Non-Contact Voltage Tester with dual-range detection and a built-in flashlight. It's designed for North American 3-wire 120V electrical outlets and provides visual and audible voltage indicators. GFCI Receptacle Tester with a large backlit LCD displaying voltage and wiring conditions Patent-pending detection of Open Neutral/Open Ground wiring faults Non-Contact Voltage Tester with dual-range detection (12-1000V AC or 70-1000V AC) Simultaneous visual and audible voltage indicators for easy detection Bright flashlight for illuminating work areas, usable independently of voltage detection Compact and lightweight design with a pocket clip for convenient storage