Klein Tools RT250 GFCI Outlet Tester with LCD Display,

Name: Klein Tools RT250 GFCI Outlet Tester with LCD Display,
Brand: KLEIN TOOLS
SKU: RT250

We are no longer standing behind this price. It was checked when posted, more than 14 days ago, and we have not re-checked it since. It may still be on; we cannot say so. See what is current →

$19.78~~$24.97~~-21%Amazon

Amazon.com has Klein Tools RT250 GFCI Outlet Tester with LCD Display on sale for $19.88, down from $24.97 (-20%). Shipping is free.

Posted August 3, 2026. Price and availability are whatever the retailer says right now.

Backlit LCD shows voltage, wiring faults, and GFCI trip time at a glance
Detects Open Neutral and Open Ground faults via patent-pending system
Auto-Hold locks in readings for hard-to-reach outlets
CAT II 135V rated with 6.6-foot drop protection
Built for standard North American 3-wire 120V receptacles; runs on 2 AAA batteries (included)

Klein Tools has been making trade-grade testers for over 160 years, and this one covers the basics an electrician or DIYer actually needs: voltage, fault type, and GFCI trip time on one backlit screen. At under $20 it undercuts most name-brand competitors like Sperry and Kaiweets while adding trip-time readout and open-neutral detection, sold and shipped directly by Amazon.

Check the current price at Amazon

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Klein Tools RT250 GFCI Outlet Tester with LCD Display,

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