Klein Tools MM325 Multimeter, Digital Manual-Ranging 600V AC/DC Voltage Tester, Tests Batteries, Current, Resistance, Diodes,
4.7 | 6,695 ratings
Price: 29.98
Last update: 02-02-2026
About this item
- VERSATILE FUNCTIONALITY: Measures AC/DC voltage up to 600V, 10A DC current, 2MΩ 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
Top reviews from the United States
- nprecise and reliable digital multi-tester for pros!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!!
- KFromOhioVery Nice Electrical Testing KitAn 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.
- justinKlein tool must haveHey, 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.
- Jessie J. Autin IIIRecommendedVery pleased with this kit! The multimeter, outlet tester, and non-contact tester all work exactly as described. Everything feels solid and well-made, and it’s a great value for the price. Perfect for quick checks and home projects—I’d definitely recommend it.
- S1Very nice, but no current meter.Really like this. Quality is nice, the controls and simple yet intuitive. The only thing that bothers me is there is no current meter. Not something that I need frequently if at all really, but lacking that keeps it from being a real multi-meter, in my opinion, which I guess is why it’s a multi-tester and not meter.
- JCGood tool and good priceGreat product and price. Still using it today and all prices are holding up great. Accurate and easy to use.
- J. WeilerNice MultimeterI 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.
- TonyDarsaved the day and some moneyFirst off, I want to clarify that I am not an electrician, but my brother is and he helped me a lot. I had an issue with one circuit in my house. It started with my living room light going on and off. Then the problem got worse. Everything on that circuit quit working and I turned the breaker off. I have a multimeter, but I am not qualified to troubleshoot with it. So, I bought this because of the circuit tester. The shipping was good I had it within 2 days. The circuit tester is so easy to use, and it is the best way to troubleshoot wiring problems. I plugged it in, and it showed open neutral. I opened every plug, switch and light on that circuit. All the wiring showed good. I was about to give up when I began to look for a hidden outlet. I found it behind my sofa. I plugged the tester in and it showed ground and hot crossed, which means a short. I opened the receptacle, and it had melted one side of the plug. Luckily, the wiring was not too damaged. I replaced the receptacle, and the problem has been resolved. For $40 this saved me a lot of money and some time diagnosing the problem. I am not an electrician, but I do have some knowledge about electricity and wiring. The multimeter is accurate, and the tester is very useful for troubleshooting. It is easy to read and simple to use. It also comes with a proximity tester to insure everything is off before working on electricity. I am not sure about the battery life but it takes 2 AAA batteries. and I am certain that no more than I will use it the batteries should last a while. Thank you, Klein, for this kit. It saved the day for me.