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⚡ Power up your safety game with Klein’s no-fail outlet tester!
The Klein Tools RT210 Outlet Tester is a professional-grade device designed to quickly detect common wiring issues and verify GFCI outlet functionality. Built tough to withstand drops and extreme temperatures, it offers reliable, instant diagnostics for 110/125V AC outlets, making it an essential tool for electricians, DIYers, and safety-conscious homeowners alike.












| ASIN | B01AKX8L0M |
| Best Sellers Rank | #5,816 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #7 in Circuit Testers |
| Brand | KLEIN TOOLS |
| Brand Name | KLEIN TOOLS |
| Color | Black/Orange |
| Compatible Devices | Standard and GFCI Receptacles |
| Customer Reviews | 4.8 out of 5 stars 8,883 Reviews |
| Global Trade Identification Number | 00092644690273 |
| Included Components | GFCI Outlet Tester |
| Item Dimensions | 5.3 x 3.8 x 1.5 inches |
| Item Type Name | Klein Tools RT210 GFCI Receptacle Tester |
| Item Weight | 1.9 Ounces |
| Item dimensions L x W x H | 5.3 x 3.8 x 1.5 inches |
| Manufacturer | Klein Tools |
| Minimum Operating Voltage | 110 |
| Model | RT210 |
| Part Number | RT210 |
| Power Source | Hand Powered |
| Specification Met | Cat Ii 300v |
| Style | GFCI Testing |
| Style Name | GFCI Testing |
| UPC | 092644690273 |
| Unit Count | 1.0 Count |
| Upper Temperature Rating | 140 Degrees Fahrenheit |
| Warranty Description | This product is warranted to be free from defects in materials and workmanship for a period of two years from the date of purchase. This warranty does not cover damage which occurs in shipment or failure which results from alteration, tampering, accident, misuse, abuse, neglect, or improper maintenance. |
C**N
Simple and reliable
This Klein outlet tester is a very handy tool to have around the house. It’s extremely simple to use—just plug it into an outlet and the indicator lights quickly show whether the wiring is correct or if there’s a problem like an open ground or reversed wiring. The built-in GFCI test button is also very useful. It allows you to quickly verify that GFCI outlets are functioning properly and trip when they should. I used it to check several outlets around the house and it worked exactly as expected. The build quality feels solid, which is typical for Klein tools, and the printed legend on the front makes it easy to interpret the light patterns. Overall this is an inexpensive but very useful tool for homeowners, DIYers, or anyone who wants to quickly verify outlet wiring and GFCI protection.
T**W
Small and mighty
Picked this up to help diagnose two outlets that weren't working. Told me I had an issue with a negative wire, pulled the outlet out and sure enough, the wire had popped off. The tool was 100% spot on in diagnosing the issue. Its compact, cheap, and works. Can't get better than that.
A**R
Easy to use
Does the job, works fantastic
A**O
Good product!
Very easy to use. Gives you a general overview of how your outlets are wired. Does not take the place of more sophisticated (and expensive) receptacle testers or an assessment by a qualified electrician, however
A**N
Must have
Quickly identifies wiring issues and gives clear indicators. Compact and sturdy. Lost one star because the labeling could be a bit clearer in low light, but overall a dependable tool for electricians and DIYers
K**K
Safe alternative to shock
Works as it should, would rather find bad receptacle this way opposed to shocking experience.
G**E
Great little tester
Klein has a better one for a few more bucks, but IIRC that one required a battery for it's nifty display. So you could count on that battery being dead at some future point when you find yourself needing an Outlet Tester. Sometimes simpler is better. For less than $15, toss this in your kit and it will beready when you need it.
J**S
Klein Tools RT210 Outlet Tester with GFCI / AFCI / Receptacle Test
Handy and reliable tool — quickly checks outlets for wiring faults and verifies GFCI/AFCI protection. Easy to use and gives clear indicator lights; great for DIY home electrical checks.
Ó**A
Excelente
Muy útil
伊**伸
アースが効いているか明確に
英語表記
A**Y
Original quality.
True Klein product. Works as it should. Love it for assessing electrical outlets.
T**D
Easy to use, easy to understand
I am not an electrician, but when I realize that my charging devices are hotter than they should I use this to insure that there are no wiring faults to damage my electronics. Professional quality and is easy to use. It is a valuable tool to have.
J**N
BIEN
Bien
Trustpilot
1 day ago
3 weeks ago