Klein Tools ET40 is an Electronic AC/DC Voltage Tester. It features indicators for positive and negative DC polarity, and tests DC voltages as low as 1.5V. It tests AC voltages 12-240VAC. Excellent for checking, verifying or troubleshooting common residential electrical wiring in electrical outlets, light fixtures, doorbells and more. It operates on 2 x AAA batteries.

WARNING

• 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.
• Never use the tester on a circuit with voltages that exceed the category based rating of this tester.
• Usage of this tester in any way other than that specified by the manufacturer can impair safe operation, resulting in severe injury or death.