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phoinix | Staff 14.5K Views
Sep 22, 2026 5:13 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.

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 SubZero5 | Staff
  • About this Deal:
    • This offer matches the previous frontpage deal which garnered 225 thumbs up.
    • Our research indicates that this deal is $3.98 less (19.9% savings) than the next best available price from a reputable merchant with prices starting from $19.98 at the time of this post.
    • Please see the original post for additional details and give the wiki and additional forum comments a read for helpful discussion.
  • 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.

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 SubZero5 | Staff
  • About this Deal:
    • This offer matches the previous frontpage deal which garnered 225 thumbs up.
    • Our research indicates that this deal is $3.98 less (19.9% savings) than the next best available price from a reputable merchant with prices starting from $19.98 at the time of this post.
    • Please see the original post for additional details and give the wiki and additional forum comments a read for helpful discussion.
  • About this Product:
  • About this Store:

Original Post

Written by phoinix | Staff

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12 Comments

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Pro
Sep 22, 2026 8:23 PM
5.1K Comments
Joined Jun 2008
AndrewinMD
Pro
Sep 22, 2026 8:23 PM
5.1K Comments
Does anyone have this? Is the LCD useful? I have an older one with just lights on it, but if this one gives a voltage reading, that could be helpful. I know one time it would have saved me a couple hours of troubleshooting.
Sep 22, 2026 8:27 PM
1.1K Comments
Joined Apr 2008
SteelyDamnedSep 22, 2026 8:27 PM
1.1K Comments
Quote from AndrewinMD View quoted comment :
Does anyone have this? Is the LCD useful? I have an older one with just lights on it, but if this one gives a voltage reading, that could be helpful. I know one time it would have saved me a couple hours of troubleshooting.
Klein's website says "GFCI Receptacle Tester features a large backlit LCD readout of voltage and clear indication of wiring conditions."
Sep 22, 2026 8:32 PM
40 Comments
Joined Jul 2026
WiseStew3867Sep 22, 2026 8:32 PM
40 Comments
The price keeps going from 17$-16$ what gives
1
Sep 22, 2026 8:58 PM
637 Comments
Joined Sep 2015

This comment has been rated as unhelpful by Slickdeals users.

Sep 22, 2026 9:13 PM
230 Comments
Joined Nov 2022
CovvieSep 22, 2026 9:13 PM
230 Comments

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

Quote from AndrewinMD View quoted comment :
Does anyone have this? Is the LCD useful? I have an older one with just lights on it, but if this one gives a voltage reading, that could be helpful. I know one time it would have saved me a couple hours of troubleshooting.
It does show voltage reading, and that is handy to see, but the reason I bought it is because it actually shows how long it takes for a GFCI outlet/breaker to actually trip & cut the connection when doing a GFCI test. I've had GFCI outlets go bad, so being able to see just how long it takes for the GFCI to detect & break the connection seemed pretty darn useful.
3
Pro
Sep 22, 2026 10:20 PM
3.4K Comments
Joined Sep 2016
vid1900
Pro
Sep 22, 2026 10:20 PM
3.4K Comments

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

Quote from AndrewinMD View quoted comment :
Does anyone have this? Is the LCD useful? I have an older one with just lights on it, but if this one gives a voltage reading, that could be helpful. I know one time it would have saved me a couple hours of troubleshooting.
I've had this for a while.

Tells you if you have low or high voltage (like if there are 2 hots connected to one circuit).

Gives you trip time for GFCI

Can show you a stolen neutral, like if there is knob & tube wiring hidden somewhere.

Will show brownout condition, even if LED lights are at full brightness.
3
Sep 22, 2026 10:52 PM
49 Comments
Joined Jul 2021
Monkeyman110Sep 22, 2026 10:52 PM
49 Comments
Quote from AndrewinMD View quoted comment :
Does anyone have this? Is the LCD useful? I have an older one with just lights on it, but if this one gives a voltage reading, that could be helpful. I know one time it would have saved me a couple hours of troubleshooting.
It is great.

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Sep 23, 2026 4:40 AM
5 Comments
Joined Feb 2015
iAnomalySep 23, 2026 4:40 AM
5 Comments
Does this work at all without batteries or when batteries deplete? I would expect the LCD to stop working but do the red and green indicator lights still work?
Sep 23, 2026 6:59 AM
754 Comments
Joined Mar 2019

This comment has been rated as unhelpful by Slickdeals users.

Pro
Sep 24, 2026 12:22 PM
2.4K Comments
Joined May 2010
artcab
Pro
Sep 24, 2026 12:22 PM
2.4K Comments
Quote from AndrewinMD View quoted comment :
Does anyone have this? Is the LCD useful? I have an older one with just lights on it, but if this one gives a voltage reading, that could be helpful. I know one time it would have saved me a couple hours of troubleshooting.
I like the GFCI testing function - I recently rewired our basement and I found the GFCI testing function useful to insure that GFCI protection was being provided to all the outlets downstream of the GFCI wired to the load side.
Sep 24, 2026 4:33 PM
33 Comments
Joined May 2020
treskateSep 24, 2026 4:33 PM
33 Comments
Thanks. I ordered one. I have a Hyper Tough version that I don't really trust.
Yesterday 1:34 PM
407 Comments
Joined Jun 2005
tigerjohnYesterday 1:34 PM
407 Comments
Thanks. Got a couple of patio outlets that's gone flakey.

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