Search  for anything...

Klein Tools MM325 Multimeter, Digital Manual-Ranging 600V AC/DC Voltage Tester, Tests Batteries, Current, Resistance, Diodes, and Continuity

  • Based on 6,353 reviews
Condition: New
Checking for the best price...
$29.98 Why this price?
New Year Deal · 14% off was $34.97

Buy Now, Pay Later


As low as $7 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Thursday, Feb 5
Order within 18 hours and 59 minutes
Available payment plans shown during checkout

Protection Plan Protect Your Purchase
Checking for protection plans...

Style: Manual-Ranging


Features

  • VERSATILE FUNCTIONALITY: Measures AC/DC voltage up to 600V, 10A DC current, 2M resistance; additional features include continuity, diode test and battery test
  • LEAD-ALERT PROTECTION: LEDs on the meter illuminate to indicate proper test lead placement, enhancing accuracy and safety during measurements
  • BACKLIT DISPLAY: LCD shows clear readings in low-light conditions for enhanced visibility
  • BATTERY TEST: Battery test mode can be used for checking if batteries are working
  • CONVENIENT FEATURES: Test lead holders on the back of the meter, kickstand and optional magnetic hanger (Cat. Nos. 69445 or 69417) for hands-free operation
  • DURABLE CONSTRUCTION: Built to withstand a 6.6-Foot (2 m) drop, for use in basic and controlled electromagnetic environments such as residential, business and light-industrial locations
  • COMPLETE PACKAGE: Includes test leads with CAT III/CAT IV safety caps, instructions, and 2 x AAA batteries

Description

Klein Tools MM325 Multimeter is a manual-ranging multimeter that measures AC/DC voltage, DC current, and resistance. It can also test batteries, diodes, and continuity. Klein Tools' Test and Measurement product line was exclusively designed from the ground up by electricians for electricians. Years of field research, combined with extensive input from electricians across America, inspired the development of meters and electrical testers loaded with innovative, time-saving features. For more than 160 years, Klein Tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right. Our family of engineers, workers and craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. Klein isn't just the name of our company, it's also our family name. And since we're an American company that's family-owned and family-run, you know you can count on us to be here tomorrow. Klein Tools doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day ... Since 1857.

Brand: KLEIN TOOLS


Power Source: Battery Powered


Style: Manual-Ranging


Color: Orange/ Black


Item Weight: 0.87 Pounds


Brand: ‎KLEIN TOOLS


Power Source: ‎Battery Powered


Style: ‎Manual-Ranging


Color: ‎Orange/ Black


Item Weight: ‎0.87 Pounds


Item dimensions L x W x H: ‎9.33 x 5.08 x 3.82 inches


Min. Operating Voltage: ‎9 Volts


Specification Met: ‎Cat Iii 600v Safety Rating


Upper Temperature Rating: ‎60 Degrees Celsius


Measurement Type: ‎Multimeter


Maximum Operating Voltage: ‎600 Volts


UPC: ‎092644693731


Manufacturer: ‎Klein Tools


Global Trade Identification Number: ‎31


Part Number: ‎MM325


Item Weight: ‎13.9 ounces


Product Dimensions: ‎9.33 x 5.08 x 3.82 inches


Item model number: ‎MM325


Batteries: ‎2 AAA batteries required. (included)


Is Discontinued By Manufacturer: ‎No


Size: ‎One Size


Finish: ‎Brushed


Material: ‎Blend


Pattern: ‎Tester


Shape: ‎Rectangular


Item Package Quantity: ‎1


Measurement Accuracy: ‎+/- 2%


Display Style: ‎LCD


Special Features: ‎Lead Alert; Backlight; Auto Power-Off; Data Hold


Included Components: ‎Multimeter, Voltage Tester


Batteries Included?: ‎Yes


Batteries Required?: ‎Yes


Battery Cell Type: ‎Alkaline


Date First Available: June 27, 2022


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Feb 5

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Great product, great value.
Style: Manual-Ranging
Great multimeter. Has a lot of functions, very easy to use, and even tells you where to put the leads for any particular setting. Highly recommend.
Reviewed in the United States on January 14, 2026 by Justin Russell

  • Very nice DMM for the money! Easy to use and has a wide range of functions!
Style: Auto-Ranging
This is a very nice DMM! Easy to use and has a wide range of functions. Great value for the money spent! Love it!
Reviewed in the United States on January 29, 2026 by bagoggans

  • precise and reliable digital multi-tester for pros!
Style: GFCI Receptacle Tester
it’s incredibly reliable and easy to use. the auto-ranging feature makes measuring voltage, current, and resistance quick and accurate, while the clear digital display ensures readings are easy to read. the compact, sturdy design feels professional and durable, perfect for both job sites and home projects. overall, this multi-tester delivers precision, convenience, and durability in one essential tool. great battery life too!! ... show more
Reviewed in the United States on November 13, 2025 by n

  • Very Nice Electrical Testing Kit
Style: Test Kit
An excellent test kit. Good selection of electrical tools for the home DIY for a reasonable cost. Did some initial testing after receiving and it appeared to work well. However have not had the news to test all settings on the MM (e.g. current). I was surprised that kit still contained the discontinued MM300 and not the MM325 that replaced it. Definitely still workable, but was a bit disappointed to find. Would recommend. ... show more
Reviewed in the United States on December 16, 2025 by KFromOhio

  • Not bad. A great meter for field techs or good back-up to a clamp meter
Style: Slim Meter
Not bad. Mid-tier capabilities with a great screen. Thinner than most full functional multimeters, side lead jacks allow for thinness, better portability without sacrificing safety or ability to change leads. As capable as my Fluke 117 but 1/3 the price and easier to pack. I would consider this to be the perfect back up to my Klein 810 Pro or for standalone use in a quick troubleshooting scenario. Nit picks include position of lead jacks right where my fingers hold the meter; lack of non-contact voltage sensing and a lack of a work light. Any two of those three would make it a 5/5. ... show more
Reviewed in the United States on May 13, 2025 by TrentO

  • Great tool to have.
Style: GFCI Receptacle Tester
so far this thing is a life saver and this is a well put together multimeter for field techs to test power on sockets. Its as always good build quality you can expect from Klein Tools and the tool is expected to last a long time. the battery life is fair and seems to hold good so far. voltage metering is very acurate and easy to read on the display. the selection dial is easy to read and select the function you need to use. over all this a great tool to have on the field. ... show more
Reviewed in the United States on July 3, 2025 by Payo

  • Klein tool must have
Style: Test Kit
Hey, the Klein 69149P is a fantastic choice for electricians or anyone looking for a reliable, all-in-one tool to handle electrical tasks. It’s especially handy for pros who want to save time and effort by having fewer tools to lug around! Durable , easy to use and has great battery life , great value. ... show more
Reviewed in the United States on September 22, 2025 by justin

  • Nice Multimeter
Style: Auto-Ranging
I bought this Klein MM420 to replace a perfectly functional, 40 year old, Heath 2372 multimeter that I gave to my teen daughter for her electronics work (as I used it when I was her age). This Klein is nice! It's a rugged easy to use multimeter with all of the basics and a few bells and whistles. . It may not be a Fluke in decimal accuracy or its high price point (which is good because I have no use for either of those things) but it IS a Klein which is why I bought it. ... show more
Reviewed in the United States on October 7, 2025 by J. Weiler

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...