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AC/DC Voltage and GFCI Receptacle Outlet Test Kit

Ratings & Reviews for Klein Tools AC/DC Voltage and GFCI Receptacle Outlet Test Kit

4.6
174
Review
 4.6 out of 5
174 Reviews


86% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

Customers overwhelmingly praise this outlet tester for its simplicity and reliability in identifying wiring issues. Most highlight the intuitive LED indicators that deliver instant results, with many calling it a must-have tool for verifying outlet wiring and testing GFCI functionality. The rugged, compact design is widely appreciated for durability and portability, even in tight spaces or while wearing gloves. A few note the probe tips are quite small and the GFCI button overly sensitive, but these minor concerns are far outweighed by strong satisfaction with performance and build quality.

Customer review summary generated by AI, including incentivized reviews.
174 Customer Reviews

A very good outlet tester

June 17, 2026
From GFCI Outlet Tester Verified Purchaser
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Works

Easy to use

June 14, 2026
From AC_SLASH_DC Voltage Tester Verified Purchaser
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Quick electric tester

Would Recommend

Small, accurate, easy to carry around with you

June 10, 2026
From GFCI Outlet Tester Verified Purchaser
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....

Would Not Recommend

They were ok

June 7, 2026
From AC_SLASH_DC Voltage Tester Verified Purchaser
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Must-Have Tool for Safe & Accurate Outlet Testing

The Klein Tools RT210 GFCI Outlet Tester is an essential device for anyone who works with electrical outlets. This compact tester plugs directly into any standard 3-prong receptacle and uses bright, easy-to-read LED lights to instantly show the wiring condition — open ground, open neutral, open hot, hot/ground reverse, hot/neutral reverse, or correct wiring. I’ve used it on dozens of outlets in my home and rental properties, and it has never given a false reading. It’s incredibly simple to opera...

May 28, 2026
From GFCI Outlet Tester Verified Purchaser
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Necessary tool in an older home

Would Recommend

Works well, good size

May 26, 2026
From GFCI Outlet Tester Verified Purchaser
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Fast tester

Would Recommend

Gave accurate reading

May 24, 2026
From GFCI Outlet Tester Verified Purchaser
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Easy to Use

Would Recommend

The product is super easy to use and is accurate, which helps to speed up projects.

May 18, 2026
From GFCI Outlet Tester Verified Purchaser
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Good product

Would Recommend

Okay

May 14, 2026
From GFCI Outlet Tester Verified Purchaser
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Great little GFCI Outlet Tester

Would Recommend

I like the GFCI tester feature. This tester comes in handy for all types of outlets.

May 13, 2026
From GFCI Outlet Tester Verified Purchaser
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Great product and reliable

Would Recommend

It works great. Made my home remodel easier

May 8, 2026
Verified Purchaser
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Must have for your tool pouch

Would Recommend

In order to test the functionality of the ground fault circuit interrupter receptacles in my home, I bought this product to do just that. Personally, I love Klein test equipment. I would honestly recommend this product to people who work in the trades and homeowners alike.

April 29, 2026
From GFCI Outlet Tester Verified Purchaser
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