KLEIN TOOLS ET310 AC Circuit Breaker Finder
Electric and Voltage Tester with Integrated GFCI Outlet Tester
Price as of 2026-06-16. Check Amazon for the current price.
Quick Decision
Price Intelligence
- Budget:$6–$14
- Mid-range:$14–$53← You are here
- Premium:$53+
Is This Right For You?
- •Buyers who prioritize quality over price in testers
- •Those who want a top-rated option — in the top 17% of testers by rating
- •Risk-averse buyers — 25,381+ reviews give a highly reliable picture
- •Top 4% bestseller in testers — proven market demand
- •KLEIN TOOLS RT250 GFCI Outlet Tester offers a better rating (4.8/5) at a similar or lower price ($25)
- •SPERRY Instruments VD7504GFI DualCheck 2-in-1 Non-Contact — 54% cheaper at $23 (Score B+)
- •KLEIN TOOLS RT250 GFCI Outlet Tester — higher rated at 4.8/5 ($25)
📊 Based on data analysis of 185 products in this category.
Mubboo Score: A-
How we calculate the Mubboo Score
Quality (45%): customer rating, normalized to a 10-point scale
Popularity (35%): review volume vs the category leader, log-scaled
Value (20%): price position vs other testers
Computed from live Amazon rating, review count, and price across 185 testers available to US consumers · last refreshed 2026-06-16.
How It Compares
This Product KLEIN TOOLS ET310 AC Circuit Breaker Finder | Most Popular Fluke 1AC II VoltAlert Non-Contact Voltage Tester | Best Rated KLEIN TOOLS RT250 GFCI Outlet Tester | Best Value SPERRY Instruments VD7504GFI DualCheck 2-in-1 Non-Contact | |
|---|---|---|---|---|
| Price | $49.97 | $34.98 | $24.97 | $22.75 |
| Rating | 4.7/5 | 4.7/5 | 4.8/5 | 4.5/5 |
| Reviews | 25,381 | 15,290 | 11,490 | 2,725 |
| Mubboo Score | A- | A- | A- | B+ |
What People Say
Synthesized from 40 reviews · 100% verified purchases.
Check included test leads and consider upgrading them for budget meters; for circuit breaker finders, allow time to learn the scanning process and always do a second pass over the panel.
- Good value for money
- Easy to use
- Accurate / reliable readings
- Useful features like backlight or audible alert
- Compact and portable design
- Quality control issues with test leads or defective units
- Requires patience or learning curve for accurate results
Related Video Reviews
- 📹 The Ultimate Voltage Tester Battle: My Surprising Favorite! — Everyday Home Repairs
- 📹 Best Voltage Testers Under $50 (2026) — Top 5 Non-Contact Pens Reviewed! — TECHATOP
About KLEIN TOOLS
- 66 products in our database
- Average rating: 4.7/5 across all products
- Price range: $9.97 – $699.98
- Categories: carpentry-squares, Coolers, Flashlights, Hand Tool Sets, Headlamps, Knee Braces
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Bottom Line
KLEIN TOOLS ET310 AC Circuit Breaker Finder earns Mubboo Score A-. Priced at $50 — a premium option, below the category average of $55. Rated 4.7/5 from 25,381+ reviews. Strong buy if: buyers who prioritize quality over price in testers, those who want a top-rated option. Skip if: klein tools rt250 gfci outlet tester offers a better rating (4.8/5) at a similar or lower price — Fluke 1AC II VoltAlert Non-Contact Voltage Tester (Score A-, $35) may fit better.
Frequently Asked Questions
Is the KLEIN TOOLS ET310 AC Circuit Breaker Finder worth buying in 2026?
It earns a Mubboo Score of A-, with a 4.7/5 rating from 25,381 reviews — better than 83% of testers we track.
How much does the KLEIN TOOLS ET310 AC Circuit Breaker Finder cost?
It is currently $49.97 — premium-tier pricing for testers.
How does the ET310 AC Circuit Breaker Finder compare to other testers?
The category's most-reviewed alternative is the Fluke 1AC II VoltAlert Non-Contact Voltage Tester (4.7/5, 15,290 reviews, $34.98). The ET310 AC Circuit Breaker Finder carries a Mubboo Score of A- vs A-.
Sources & References
Products available through US retailers. Prices in USD. Sales tax varies by state and is not included.
Mubboo may earn a commission on purchases made through affiliate links. This does not affect our Mubboo Score, product rankings, or editorial judgments. Prices are accurate as of the last sync (2026-06-16) and may change.