Klein MM720 reviews are generally positive, but the useful buying questions are in the details. A Lowe’s listing for the MM720 showed a 4.5/5 rating from 90 reviews in the source snapshot we examined. Its retailer-generated review summary highlighted functionality and value while mentioning test-lead quality, auto-off behavior and battery concerns. Those are signals to investigate, not proof that every comment came from an MM720 owner or that any fault is widespread.
Affiliate disclosure: This page contains eBay affiliate links. JHOTAS-LAB may earn a commission on qualifying purchases through those links, at no additional cost to you.
This is a review-source analysis, not a hands-on test. We checked the retailer’s visible customer comments and summary against Klein Tools’ product specifications and actual MM720 manual. We did not purchase or electrically test the instrument, download a complete review dataset or count the frequency of complaints ourselves.
What We Actually Found in the Customer Reviews
| Observed review topic | Evidence and practical meaning |
|---|---|
| Value and useful functions | Lowe’s summary emphasizes broad measuring functions and value. Check which functions you will actually use. |
| AC/DC selection | One visible reviewer dislikes the extra SEL-button step for DC. The manufacturer manual confirms the button changes modes. |
| Auto power-off | A visible review complains about shutoff; the manual specifies roughly five minutes and a startup method to disable it. |
| Test leads and battery life | Mentioned in Lowe’s generated summary, but no independently verified defect rate is available from this review. |
| Ratings | 4.5/5 over 90 displayed reviews is retailer feedback, not a laboratory reliability result. |
Lowe’s warns that ratings may include incentivized reviews. Its visible feed also identifies certain comments as imported from a different, 600V auto-ranging multimeter page. We excluded those cross-model comments from MM720-specific conclusions. The 90-review figure is the retailer’s displayed total, not 90 individually inspected MM720 reviews; duplicates and syndication across merchants were not audited.
Complaint 1: Why Does the MM720 Shut Off So Quickly?
One electronics-oriented review describes aggressive auto shutoff. Klein’s own MM720 manual states the meter powers off after about five minutes of inactivity. It can be reactivated with a button. To disable automatic power-off, the manual instructs users to switch the meter on while holding SEL. That is a documented feature, not evidence that the reviewer’s meter was faulty.
For longer measurements, decide whether five-minute shutoff fits your workflow. Disabling it can increase battery use.
Complaint 2: AC/DC Mode Requires Attention
A visible June 2026 Lowe’s reviewer noted that the rotary selection favors an AC default and switching to DC takes a button press. Klein’s manual says SEL switches AC and DC for voltage, current and LoZ functions, with the selected mode indicated on the display. This is a usability preference rather than a failure of the measuring hardware.
If your work alternates between residential AC circuits and DC control systems, check the mode indicator every time. Never assume the meter has automatically chosen the required measurement or that a non-contact indicator substitutes for a proper absence-of-voltage test.
Complaint 3: Are the Leads and Batteries a Real Problem?
The Lowe’s automated review summary flags some concerns about test leads and battery consumption. Those comments deserve attention, but the accessible extract does not establish a percentage, a common manufacturing defect or even how many affected comments are specifically about the MM720. A separate visible lead-tip complaint was imported from another meter listing, so attributing it to the MM720 would be misleading.
Klein lists leads, batteries, a pouch and a thermocouple among the included items. Check test-lead insulation and ratings; inspect fuses, jacks and the battery compartment, particularly on used units. Never fit an incorrectly rated fuse.
What the Manufacturer Confirms — and Reviews Cannot Prove
Klein specifies True-RMS measurement, auto-ranging, AC/DC voltage to 1000V, current to 10A, a reverse-contrast display, temperature, capacitance, frequency and low-impedance (LoZ) measurement. The instrument carries a CAT III 1000V / CAT IV 600V rating, plus an IP42 enclosure rating and a stated 2-meter drop specification. Those are manufacturer claims, not results of our independent tests.
The manual places different voltage limits on certain modes, including LoZ. Ratings of the instrument, probes and the installation category must all suit the measurement point; a high voltage number in a marketing table never overrides the detailed safety instructions.
Who Might Find These Reviews Useful?
Consider the MM720 for mixed AC/DC voltage, temperature and capacitance work. Specialized industrial measurements and uninterrupted monitoring call for closer model comparison.
For a feature-by-feature choice, read Klein MM720 vs Fluke 117. For a different Fluke purchasing decision, see Fluke 117 vs 87V. If you want to compare changing resale offers, visit Jobsite Tool Deals and verify the full unit, condition, authenticity and included accessories before paying.
Where to Check Current Offers
The eBay listings below are dynamic offers, not a verified price history or a reproduction of the Lowe’s customer reviews. Confirm the exact MM720 model and current seller terms. Affiliate disclosure: A qualifying eBay purchase through a partner link may earn JHOTAS-LAB a commission without an additional charge to the buyer.
Klein MM720 True-RMS Multimeter
Compare Klein MM720 listings on eBay →As an eBay Partner, I may be compensated if you make a purchase.
Bottom Line
Retailer feedback is broadly favorable, while one visible review questions AC/DC mode selection and auto-off behavior. Klein’s manual explains both. Lead and battery issues appear in an automated summary, not a reliable defect-rate study.
Sources & Official References
- Lowe’s, Klein Tools MM720 customer-review page — displayed rating, snapshot review count, visible individual comments, retailer-generated summary, imported-review indicators.
- Klein Tools, MM720 official product page — published features, safety ratings and included items.
- Klein Tools, MM720 instruction manual (PDF) — AC/DC selection, auto power-off, limits and safety instructions.
- Home Depot, MM720 review listing — supplementary retailer listing; counts were not pooled with Lowe’s.
About the Author
JHOTAS-LAB is maintained by an electrical construction and project-coordination practitioner in South Korea. U.S. product commentary is based on public reviews and official documents, not claimed U.S. jobsite testing or personal use of the MM720.
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