Klein Tools Premium Electrical Test Kit Cat. No. RT250KIT includes an electrical receptacle tester with LCD and a non-contact voltage tester with flashlight. The electrical receptacle tester, Cat. No. RT250 tests the wiring conditions at an electrical outlet and inspects GFCI devices. The LCD displays the voltage, identifies the wiring fault, and the time required to trip a GFCI device. It is designated for use with North American 3-wire 120V electrical outlets. The non-contact voltage tester with flashlight, Cat. No. NCVT3P has dual-range detection from 12 to 1000V AC or 70 to 1000V AC for a broad variety of low-voltage or standard voltage applications. The bright flashlight can be used independent of, or with the voltage detection function.