---
product_id: 272328882
title: "RT250 GFCI Outlet Tester with LCD Display, Electric Voltage Tester for Standard 3-Wire 120V Electrical Receptacles"
brand: "klein tools"
price: "₪152"
currency: ILS
in_stock: true
reviews_count: 8
category: "Klein Tools"
url: https://www.desertcart.co.il/products/272328882-rt250-gfci-outlet-tester-with-lcd-display-electric-voltage-tester
store_origin: IL
region: Israel
---

# Clear LCD readout Precise GFCI trip time Bright LED wiring indicators RT250 GFCI Outlet Tester with LCD Display, Electric Voltage Tester for Standard 3-Wire 120V Electrical Receptacles

**Brand:** klein tools
**Price:** ₪152
**Availability:** ✅ In Stock

## Summary

> ⚡ Test Smarter, Work Safer — The Pro’s Choice for Electrical Confidence

## Quick Answers

- **What is this?** RT250 GFCI Outlet Tester with LCD Display, Electric Voltage Tester for Standard 3-Wire 120V Electrical Receptacles by klein tools
- **How much does it cost?** ₪152 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.il](https://www.desertcart.co.il/products/272328882-rt250-gfci-outlet-tester-with-lcd-display-electric-voltage-tester)

## Best For

- klein tools enthusiasts

## Why This Product

- Trusted klein tools brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Advanced Fault Detection:** Patent-pending tech spots open neutral & ground faults others miss—stay ahead of hazards.
- • **Precision GFCI Trip Timing:** See exact trip time on display for fast, reliable troubleshooting and safety assurance.
- • **Effortless Auto-Hold Function:** Lock readings on hard-to-reach outlets—no more awkward guessing or repeated tests.
- • **Pro-Grade Safety & Durability:** CAT II 135V rating and Klein’s 160+ years of trusted craftsmanship ensure professional reliability.
- • **Instant Voltage & Wiring Clarity:** Large backlit LCD delivers crystal-clear voltage readings and wiring status at a glance.

## Overview

The Klein Tools RT250 GFCI Outlet Tester is a professional-grade device designed for quick, accurate testing of 3-wire 120V electrical outlets. Featuring a large backlit LCD, it displays voltage, wiring faults, and GFCI trip times with precision. Its patent-pending open neutral and ground detection technology, combined with bright LED indicators and an auto-hold function, make it an indispensable tool for electricians and savvy DIYers alike. Built with Klein’s renowned durability and a CAT II 135V safety rating, this tester ensures reliable, safe electrical diagnostics every time.

## Description

The RT250 is an electrical receptacle tester that tests the wiring conditions at an electrical outlet and inspects GFCI devices. The LCD displays the voltage, identifies the wiring fault, and the time required to trip a GFCI device. It is designated for use with North American 3-wire 120V electrical outlets. For more than 160 years, Klein Tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right. Our family of engineers, workers and craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. Klein isn't just the name of our company, it's also our family name. And since we're an American company that's family-owned and family-run, you know you can count on us to be here tomorrow. Klein Tools doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day ... Since 1857.

Review: Simple and easy to use yet Amazing precision!!! - I picked up the Klein Tools RT250 GFCI Outlet Tester to help check a few outlets around my house, and I’m honestly impressed. This thing is super straightforward, just plug it in, the lights pop on, and you instantly know what’s going on with the wiring. No guesswork, no complicated setup, just clear results. The display is bright and easy to read, and the built-in GFCI test button is a lifesaver when checking bathroom and kitchen outlets. It helped me identify a miswired outlet in an older part of my house that I never would’ve caught otherwise. For something at this price, it feels durable and professional like something an electrician would actually use. If you’re a homeowner, DIYer, or just want peace of mind about the electrical safety in your place, this is a solid buy. Fast, accurate, and super easy to use. Highly recommend!
Review: Very nice electrical tester - Great addition to my electrical tools. This tester has a nice LCD screen that shows voltage, wiring status (correct or not correct) and GFCI test results. Very useful information

## Features

- CLEAR LCD READOUT: GFCI Receptacle Tester features a large backlit LCD readout for easy voltage reading and clear indication of wiring conditions
- TRIP TIME DISPLAY: LCD readout shows the time required to trip a GFCI device, allowing for quick and accurate troubleshooting
- DETECT COMMON WIRING FAULTS: Detect and identify common wiring faults, ensuring electrical safety and proper functionality of GFCI receptacles
- PATENT-PENDING OPEN NEUTRAL & OPEN GROUND DETECTION: Innovative detection system identifies Open Neutral and Open Ground wiring faults, enhancing safety measures
- CONVENIENT AUTO-HOLD FEATURE: Auto-Hold function holds the reading for hard-to-reach outlets, providing convenience and ease of use
- VISIBLE LED INDICATORS: Bright green and red LEDs illuminate to provide clear visual indicators of wiring conditions, making it easy to identify issues
- CAT II 135V SAFETY RATING: GFCI Receptacle Tester has a CAT II 135V safety rating, ensuring reliable and safe electrical testing for various applications

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08QW7K1JJ |
| Best Sellers Rank | #1,145 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #4 in Voltage Testers |
| Brand | KLEIN TOOLS |
| Brand Name | KLEIN TOOLS |
| Color | Multi |
| Customer Reviews | 4.8 out of 5 stars 11,171 Reviews |
| Global Trade Identification Number | 00092644693212 |
| Included Components | 2 x 1.5V AAA Alkaline Batteries and Manual |
| Item Dimensions | 4.53 x 1.16 x 2 inches |
| 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 | 4.16 ounces |
| Item Width | 2 Inches |
| Item dimensions L x W x H | 4.53 x 1.16 x 2 inches |
| Manufacturer | Klein Tools |
| Maximum Operating Voltage | 120 Volts |
| Measurement Type | Voltmeter |
| Minimum Operating Voltage | 120 Volts (AC) |
| Model | RT250 |
| Power Source | Corded Electric |
| Specification Met | CSA |
| Style | Receptacle Tester |
| Style Name | Receptacle Tester |
| UPC | 092644693212 |
| Unit Count | 1 Count |
| Upper Temperature Rating | 60 Degrees Celsius |
| Warranty Description | Please refer to attached warranty document for information |

## Product Details

- **Brand:** KLEIN TOOLS
- **Color:** Multi
- **Item Weight:** 0.26 Pounds
- **Power Source:** Corded Electric
- **Style:** Receptacle Tester

## Images

![RT250 GFCI Outlet Tester with LCD Display, Electric Voltage Tester for Standard 3-Wire 120V Electrical Receptacles - Image 1](https://m.media-amazon.com/images/I/61HibJa1brL.jpg)

## Questions & Answers

**Q: Is it ok to use this tester for the 20a power outlet (not gfci)?**
A: A Very good question, since the device name starts  with GFCI.  Answer is YES, because despite the name, the device is mainly a regular outlet tester, checking cross wiring, missing wiring, and reporting voltages, all worthwhile tests for non-GFCI outlet.  Also works with 15amp & 30amp with adapter.  Thanks for the question.

**Q: Most of the outlets in the basement where i'm living say >6.00 when i test them. are they wired wrong? is it safe to use the outlets?**
A: It is not safe to use those outlets. If an outlet is good, the green light on the tester should illuminate, and the display should register a voltage close to 120 volts.

**Q: Is this accurate enough to measure with some confidence which is the most upstream receptacle in a circuit for choosing gfci location?**
A: Resolution accuracy inadequate for that task. Displayed digits determines resolution. In this case, meter accuracy will not be and can not be better than +/- 1 volt because digital resolution is always +/- 1 in the least significant digit.
Example: If measuring a true, standardised 120 volts, meter might display 119V (-1), 120V or 121V (+1) if calibrated/adjusted correctly.
You've got the right idea, but this meter displays only 2-1/2 digits (120V). You will need a meter with 3-1/2 (120.0V) digits displayed. Worst case resolution at 120 volts will then be ~0.1V (100 mV). You need to see those millivolts differences. Get one with stated accuracy and preferably calibrated. Cheers!

**Q: What will happen if you press the gfci test on a non gfci? will it do nothing. or will it trip the breaker in the panel, and i have to flip the switch**
A: The amber lights on the tester will blink, nothing will trip.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Simple and easy to use yet Amazing precision!!!
*by D***N on December 31, 2025*

I picked up the Klein Tools RT250 GFCI Outlet Tester to help check a few outlets around my house, and I’m honestly impressed. This thing is super straightforward, just plug it in, the lights pop on, and you instantly know what’s going on with the wiring. No guesswork, no complicated setup, just clear results. The display is bright and easy to read, and the built-in GFCI test button is a lifesaver when checking bathroom and kitchen outlets. It helped me identify a miswired outlet in an older part of my house that I never would’ve caught otherwise. For something at this price, it feels durable and professional like something an electrician would actually use. If you’re a homeowner, DIYer, or just want peace of mind about the electrical safety in your place, this is a solid buy. Fast, accurate, and super easy to use. Highly recommend!

### ⭐⭐⭐⭐⭐ Very nice electrical tester
*by K***M on January 28, 2026*

Great addition to my electrical tools. This tester has a nice LCD screen that shows voltage, wiring status (correct or not correct) and GFCI test results. Very useful information

### ⭐⭐⭐⭐⭐ Best GFCI Outlet Tester Available
*by M***R on January 1, 2026*

This review is for Klein Tools RT250 GFCI Outlet Tester with LCD Display, Electric Voltage Tester for Standard 3-Wire 120V Electrical Receptacles. This is the best outlet tester I have seen so far. I love the backlit readout and that it gives you the voltage information too. All the features, including the GFCI test, work flawlessly. I have never had a Klein tool that I have been unhappy with, and I find this tester to be a great value.

## Frequently Bought Together

- Klein Tools RT250 GFCI Outlet Tester with LCD Display, Electric Voltage Tester for Standard 3-Wire 120V Electrical Receptacles
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**Shop now:** [https://www.desertcart.co.il/products/272328882-rt250-gfci-outlet-tester-with-lcd-display-electric-voltage-tester](https://www.desertcart.co.il/products/272328882-rt250-gfci-outlet-tester-with-lcd-display-electric-voltage-tester)

---

*Product available on Desertcart Israel*
*Store origin: IL*
*Last updated: 2026-03-02*