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⚡ Test Smarter, Work Safer — The Pro’s Choice for Electrical Confidence
The Klein Tools RT250 GFCI Outlet Tester is a professional-grade electrical testing device designed for North American 3-wire 120V outlets. Featuring a large backlit LCD, it provides clear voltage readings, wiring fault detection including open neutral and ground, and precise GFCI trip time measurement. With a CAT II 135V safety rating, auto-hold functionality, and bright LED indicators, it ensures fast, reliable diagnostics for electricians and savvy DIYers alike.


















| ASIN | B08QW7K1JJ |
| Best Sellers Rank | #349,293 in Home Improvement ( See Top 100 in Home Improvement ) #517 in Multi Testers |
| Brand | KLEIN TOOLS |
| Brand Name | KLEIN TOOLS |
| Colour | Multi |
| Customer Reviews | 4.8 out of 5 stars 11,020 Reviews |
| Global Trade Identification Number | 00092644693212 |
| Included Components | 2 x 1.5V AAA Alkaline Batteries and Manual |
| Item Dimensions | 11.5 x 2.9 x 5.1 Centimeters |
| Item Length | 4.5 Inches |
| Item Type Name | Klein Tools RT250 GFCI Receptacle Tester with LCD Display, for Standard 3-Wire 120V Electrical Outlets |
| Item Weight | 0.26 Pounds |
| Item Width | 2 Inches |
| Item dimensions L x W x H | 11.5 x 2.9 x 5.1 Centimeters |
| Manufacturer | Klein Tools |
| Maximum Operating Voltage | 120 Volts |
| Measurement Type | Voltage Tester |
| Minimum Operating Voltage | 120 Volts |
| Model Number | RT250 |
| Part Number | RT250 |
| Power Source | Corded Electric |
| Power Source Type | Corded Electric |
| Specification Met | CSA |
| Style | Receptacle Tester |
| Style Name | Receptacle Tester |
| UPC | 092644693212 |
| Unit Count | 1 Count |
| Upper Temperature Rating | 60 Degrees Celsius |
F**S
Handy Tool
This tester could save your life. Used in an RV with no issues - the tester showed all was well. Using the same tester in a house, it gave an indication of potential wiring issue, as the voltage showed 30VAC on first check and 123V on a subsequent check. It will also indicate ground issue, reverse polarity. Glad to have bought.
‘**—
Excellent tool for testing electrical outlets
This tool makes testing electrical outlets quick and easy. It is especially helpful to locate GFI outlets that are chained together. The tester can purposely trip the GFI and you can locate the downstream outlets that do not have power. The only drawback is it can be difficult to remove it from some outlets.
M**C
Great combination set and well made tools.
I am very pleased with this purchase and as have already used these tools several times. They are very well made and certainly get the job done. The non-contact tester is really something I should have had many years ago. It really saves you from that occasional zap when you think you had a dead wire, but it was really still hot. The wire cutters/strippers are great quality and comfortable to use with nice padded grips. The GFCI tester has a nice display and tells you in plain English if the ground is open or not. These are really a must have set of tools for any electrical project.
P**A
Buen probador
Excelente herramienta para medir voltajes
J**Z
Funcional
Funciona perfecto y es muy práctico lo volvería a comprar
Trustpilot
1 day ago
1 week ago