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phoinix | Staff 7.6K Views
Oct 14, 2026 5:06 PM

Klein Tools GFCI Receptacle Outlet Tester w/ LCD

$16

$25

36% off
Amazon
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Deal Details
Amazon has Klein Tools GFCI Outlet Receptacle Tester w/ LCD (RT250) on sale for $16. Shipping is free with Prime or on $35+ orders.

Home Depot has Klein Tools GFCI Outlet Receptacle Tester w/ LCD (RT250) on sale for $16. Shipping is free.

Thanks to Deal Hunter phoinix for sharing this deal.

Product Details:
  • GFCI receptacle tester with large backlit LCD readout for voltage and wiring conditions
  • Displays trip time for GFCI devices
  • Detects and identifies common wiring faults
  • Patent-pending Open Neutral and Open Ground detection
  • Auto-Hold feature for hard-to-reach outlets
  • Uses 2 x 1.5V AAA batteries (included)

Editor's Notes

Written by powerfuldoppler | Staff
  • About this Deal:
    • This price matches the previous frontpage deal
    • Please see the original post for additional details and give the wiki and additional forum comments a read for helpful discussion.
    • Our research indicates that this offer is $3 lower than the next best available price from a reputable merchant with prices starting from $19.98
  • About this Product:
  • About this Store:

Original Post

Written by phoinix | Staff
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Amazon has Klein Tools GFCI Outlet Receptacle Tester w/ LCD (RT250) on sale for $16. Shipping is free with Prime or on $35+ orders.

Home Depot has Klein Tools GFCI Outlet Receptacle Tester w/ LCD (RT250) on sale for $16. Shipping is free.

Thanks to Deal Hunter phoinix for sharing this deal.

Product Details:
  • GFCI receptacle tester with large backlit LCD readout for voltage and wiring conditions
  • Displays trip time for GFCI devices
  • Detects and identifies common wiring faults
  • Patent-pending Open Neutral and Open Ground detection
  • Auto-Hold feature for hard-to-reach outlets
  • Uses 2 x 1.5V AAA batteries (included)

Editor's Notes

Written by powerfuldoppler | Staff
  • About this Deal:
    • This price matches the previous frontpage deal
    • Please see the original post for additional details and give the wiki and additional forum comments a read for helpful discussion.
    • Our research indicates that this offer is $3 lower than the next best available price from a reputable merchant with prices starting from $19.98
  • About this Product:
  • About this Store:

Original Post

Written by phoinix | Staff

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10 Comments

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Oct 15, 2026 4:29 AM
32 Comments
Joined Dec 2024
WetTile64Oct 15, 2026 4:29 AM
32 Comments
Does the LCD on this one actually show the line voltage, or is it the pass fail lights with a screen? New house, half the outlets are a mystery, and a real voltage number would save me a trip back for the multimeter.
Oct 15, 2026 8:29 PM
111 Comments
Joined Feb 2007
osaferOct 15, 2026 8:29 PM
111 Comments
It's a great little device
Oct 16, 2026 4:58 AM
2 Comments
Joined Jun 2019
WadeMcflyOct 16, 2026 4:58 AM
2 Comments
Quote from WetTile64 View quoted comment :
Does the LCD on this one actually show the line voltage, or is it the pass fail lights with a screen? New house, half the outlets are a mystery, and a real voltage number would save me a trip back for the multimeter.
Yes it shows line voltage
Pro
Oct 16, 2026 3:08 PM
3.5K Comments
Joined Sep 2016
vid1900
Pro
Oct 16, 2026 3:08 PM
3.5K Comments

Our community has rated this post as helpful. If you agree, why not thank

Quote from WetTile64 View quoted comment :
Does the LCD on this one actually show the line voltage, or is it the pass fail lights with a screen? New house, half the outlets are a mystery, and a real voltage number would save me a trip back for the multimeter.
The display reads up to 150vac, and if it is above that, you get the " >150vac " to tell you that you probably have 2 hots on the outlet.

It holds the reading for a few seconds after being unplugged, so if you have a new house where all the outlets are Ground pin up (or an old house where switched outlets are Ground up) you can read the display without using your phone's camera.
3
Oct 16, 2026 3:14 PM
71 Comments
Joined Dec 2011
chinese88Oct 16, 2026 3:14 PM
71 Comments
Handy tool. I have two.
Oct 16, 2026 3:19 PM
29 Comments
Joined Jun 2015
adilszOct 16, 2026 3:19 PM
29 Comments
Thanks OP
Oct 16, 2026 4:25 PM
14 Comments
Joined Nov 2015
beestekOct 16, 2026 4:25 PM
14 Comments
This is a really nice plug tester

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Oct 16, 2026 11:59 PM
34 Comments
Joined Jan 2025
purpleleotardmanOct 16, 2026 11:59 PM
34 Comments
$16 again, same as the last two front page runs. Easy one to keep in the toolbox
Oct 18, 2026 5:36 AM
629 Comments
Joined Nov 2017
Rudedog7Oct 18, 2026 5:36 AM
629 Comments
Used this to quickly determine that my neighbors house had an open neutral arcing in his main. Could have been bad news if they didn't catch it.
Today 12:26 PM
5.1K Comments
Joined Jun 2008
AndrewinMDToday 12:26 PM
5.1K Comments
Missed it last time, jumping this time since I'm giving my daughter my current GFCI outlet tester.

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