Klein Tools ET45 is an Electronic Voltage Tester. 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.

Tests AC voltages from 24V to 240V AC at four useful levels.
Tests DC voltages from 32V to 330V at four levels.
Built-in test lead holder on back of 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.
Test leads can be docked in the holder for convenient storage.
Batteries not required; tester is powered by the applied voltage.
Built to withstand a 9.8-Foot (3 m) drop.
Safety Rating: CATIII 350V, Class 2, Double insulation.
Ingress protection IP44 dust and water resistant.
Pocket clip secures tester to pocket for reliable everyday carrying.