Klein Tools' Cat. No. ET45VP Kit includes an Electronic Voltage Tester, Cat. No. ET45 and a Receptacle Tester, Cat. No. RT210. The ET45 is designed as a simple, easy to use tester to check, verify or troubleshoot common residential electrical wiring in electrical outlets, light fixtures, doorbells and more. This tester does not require batteries, and features a pocket clip for convenient carrying. The RT210 is designed to detect the most common wiring problems in standard and GFCI receptacles. A convenient chart on the tester helps determine wiring condition in outlet, based on LED lights results. Conditions indicated: open ground, reverse polarity, open hot, open neutral, hot / ground reversed. Warnings: Read, understand, and follow all instructions, cautions and warnings attached to and/or packed with all test and measurement devices before each use.; Before each use, verify tester operation by measuring a known voltage.; Never use the tester on a circuit with voltages that exceed the category based rating of this tester.; Always adhere to local and national safety codes. Use personal protective equipment to prevent shock and arc blast injury where hazardous live conductors are exposed.; Usage of this tester in any way other than that specified by the manufacturer can impair safe operation, resulting in severe injury or death. - Features: Electronic voltage tester is designed to test AC voltages from 24 to 240V AC at four useful levels; Tests DC voltages from 32 to 330V at four levels; Built-in test lead holder on back of voltage tester holds the leads in one of two positions: one so that they are spaced correctly to test tamper-resistant US-style outlets and the other for convenient storage of the test leads; Batteries not required; voltage tester is powered by the applied voltage; Voltage tester is rated CATIII 350V, Class 2, Double insulation and has IP44 ingress protection; Receptacle tester detects the most common wiring problems in standard and GFCI receptacles; Works on GFI outlets and confirms operation of the ground fault protective device; Nominal Voltage of receptacle tester: 110/125V AC at 50/60Hz in 3-wire outlet; ET45: Built-in Test Lead Holders; RT210: Convenient Chart on the Tester