--- product_id: 23796663 title: "MM300" brand: "klein tools" price: "C$6672" currency: NIO in_stock: true reviews_count: 13 url: https://www.desertcart.ni/products/23796663-mm300 store_origin: NI region: Nicaragua --- # 600V AC/DC voltage range Battery & diode testing CAT III 600V safety rating MM300 **Brand:** klein tools **Price:** C$6672 **Availability:** ✅ In Stock ## Summary > 🛠️ Klein Tools MM300: The rugged multimeter that means business—don’t get left in the dark! ## Quick Answers - **What is this?** MM300 by klein tools - **How much does it cost?** C$6672 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/23796663-mm300) ## Best For - klein tools enthusiasts ## Why This Product - Trusted klein tools brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Endure:** Rugged design survives 3.3-foot drops—ready for any job site hustle - • **Safety First, Always:** CAT III 600V rating ensures top-tier protection in residential & light industrial settings - • **Plug & Play Convenience:** Includes flexible test leads, batteries, and user manual for instant professional use - • **All-in-One Testing Power:** Tests batteries, diodes, continuity, current, and resistance with manual ranging accuracy - • **Pro-Level Voltage Precision:** Measures up to 600V AC/DC for versatile electrical diagnostics ## Overview The Klein Tools MM300 is a professional-grade digital manual-ranging multimeter designed for electricians and DIY pros alike. It measures AC/DC voltage up to 600V, DC current up to 10A, and resistance up to 2MΩ, while also testing batteries, diodes, and continuity. Built tough to withstand 3.3-foot drops and daily job site wear, it carries a CAT III 600V safety rating for reliable protection. Complete with test leads, batteries, and a user manual, this tool combines precision, durability, and safety in a compact, easy-to-use package trusted by professionals since 1857. ## Description Klein Tools MM300 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. Review: A good starter meter for any budding maker or DIYer that won't break the bank. - This is my review of the following items: Klein Tools model MM300 digital multimeter PLEASE NOTE: I am NOT Gough Lui or Dave Jones at EEVBlog. Therefore, I do not have access to thousands of dollars of expensive test gear to fully validate the usability or reliability of these products. This review is from the viewpoint of the average buyer/user of above listed products. It is not an exhaustive test and there will be some information provided that's still preliminary due to insufficient testing time alloted. This will be carefully noted in each item's review and preliminary information will be updated as time allows. GENERAL REVIEW - This multimeter is quite the respectable lot. It is VERY sturdily built and passes the "twist test" with gusto. The leads are very flexible and the connectors plug into the meter very snugly and won't fall out easily. The tips of the probes are sharp, but not so sharp that they'd go right through you easily. Also, the manual range switch is very stout and tight, with a very firm click that's reassuring to the touch. If there are any flaws with this meter, it would probably be the very long delay that you wait for the buzzer to sound when touching the probes together in continuity mode. I've seen meters reviewed by the likes of EEVBlog and The Defpom that are faster acting than this one, but that may be due to things outside my control including dirty probes. However, it registers voltage and resistance very quickly and the 1.5-9 volt battery test is useful. I am confident that this meter will last a long time with the proper care. The only other issue I can find, aside from the tardy response time in continuity mode, is Klein Tools' choice to use AAA cells instead of AA cells to power this meter, but I suppose that's a case of "You get what you pay for". I am not able to test it, but I'm certain this meter will survive 600 volts without issue. How many cheap sub-$20 Chinese meters do you know that can do that? CLOSING THOUGHTS - To summarize, the Klein Tools MM300 is a competent and very well-built meter that also accomplishes this without draining your wallet. It does have its limitations like a slow response to continuity checks and limited battery life owing to its use of AAA cells instead of AA cells. But overall, I'd recommend this meter for the individual who is just starting out in his/her first electronics project or the intrepid do-it-yourself home handyman who just needs a basic no-frills multimeter that's also reasonably inexpensive, very robust and abides totally to safety codes and regulations and won't crap out after a year or two of use. Review: Feels solid, works great. - For the price, I'm surprised at how good this feels. I need something I can depend on for work, but only need it a few times a year. I had an off-brand one I purchased a couple of years ago that didn't last for more than a few uses. This was only a couple of dollars more but feels way better. I really can't review the quality yet, I've only used it once, it will take time to know how good it really is, but the fact it's a Klein and because of the feel of it, I'm sure this will last for a long time. ## Features - Multimeter measures up to 600V AC/DC voltage, 10A DC current and 2MOhms resistance - Voltage tester for batteries, diodes and continuity - Built to withstand a 3.3-foot (1m) drop and withstand daily wear and tear on the job site - For use in basic and controlled electromagnetic environments such as residential, business and light-industrial locations - CAT III 600V safety rating - Low battery indicator and easily accessible battery compartment - Includes test leads, batteries and user manual ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B018O18VUW | | Best Sellers Rank | #409,072 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #647 in Multi Testers | | Brand Name | KLEIN TOOLS | | Color | Orange | | Customer Reviews | 4.7 4.7 out of 5 stars (1,617) | | Global Trade Identification Number | 00092644690198 | | Included Components | Test Leads, Batteries, and User Manual | | Item Dimensions | 8.9 x 4.8 x 1.7 inches | | Item Type Name | Klein Tools Digital Multimeter, Manual-Ranging, 600V MM300 | | Item Weight | 12.24 ounces | | Manufacturer | Klein - Geneva Supply | | Measurement Type | Multimeter, Voltmeter | | Model | MM300 | | Power Source | Hand Powered | | Style Name | Multimeter | | UPC | 092644690198 675904101919 696582472689 | | Unit Count | 1.0 Count | | Upper Temperature Rating | 50 Degrees Celsius | | Warranty Description | 1 year manufacturer | ## Product Details - **Brand:** KLEIN TOOLS - **Color:** Orange - **Item Weight:** 12.24 ounces - **Power Source:** Hand Powered - **Style:** Multimeter ## Images ![MM300 - Image 1](https://m.media-amazon.com/images/I/51+4f16OplL.jpg) ![MM300 - Image 2](https://m.media-amazon.com/images/I/61pQDGyBneL.jpg) ![MM300 - Image 3](https://m.media-amazon.com/images/I/61gg8Wb+EnL.jpg) ![MM300 - Image 4](https://m.media-amazon.com/images/I/61eM7UX1gYL.jpg) ![MM300 - Image 5](https://m.media-amazon.com/images/I/61Xr7kPvZ3L.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: What type batteries and fuses does it take** A: It uses 2 x AAA batteries. Replace blown fuse with 200mA/600V fast-blow (Klein Cat No. 69031) The 10A jack requires 10A/600V fast-blow (Klein Cat. No. 69032) **Q: Does it beep when using to check for continuity?** A: It has a setting for tone if checking continuity. It won’t beep when set on ohms. **Q: I want to test household batteries. Is this unit able to put a load on the battery dyring testing?** A: No, i dont think thats a standard multimeter function. You can, however, do a load test using this meter and a power resistor. You put this meter in dc volt mode, connect it across the terminals of the battery, then connect a load resistor in parallel (also across terminals of battery). Compare the open circuit voltage to the voltage under load. The voltage drop should be specified for battery type. You should be able to calculate the appropriate resistor value using specs for the battery type as well. **Q: Does it come with a manuel?** A: It comes with instructions. ## Customer Reviews ### ⭐⭐⭐⭐⭐ A good starter meter for any budding maker or DIYer that won't break the bank. *by S***. on May 7, 2022* This is my review of the following items: Klein Tools model MM300 digital multimeter PLEASE NOTE: I am NOT Gough Lui or Dave Jones at EEVBlog. Therefore, I do not have access to thousands of dollars of expensive test gear to fully validate the usability or reliability of these products. This review is from the viewpoint of the average buyer/user of above listed products. It is not an exhaustive test and there will be some information provided that's still preliminary due to insufficient testing time alloted. This will be carefully noted in each item's review and preliminary information will be updated as time allows. GENERAL REVIEW - This multimeter is quite the respectable lot. It is VERY sturdily built and passes the "twist test" with gusto. The leads are very flexible and the connectors plug into the meter very snugly and won't fall out easily. The tips of the probes are sharp, but not so sharp that they'd go right through you easily. Also, the manual range switch is very stout and tight, with a very firm click that's reassuring to the touch. If there are any flaws with this meter, it would probably be the very long delay that you wait for the buzzer to sound when touching the probes together in continuity mode. I've seen meters reviewed by the likes of EEVBlog and The Defpom that are faster acting than this one, but that may be due to things outside my control including dirty probes. However, it registers voltage and resistance very quickly and the 1.5-9 volt battery test is useful. I am confident that this meter will last a long time with the proper care. The only other issue I can find, aside from the tardy response time in continuity mode, is Klein Tools' choice to use AAA cells instead of AA cells to power this meter, but I suppose that's a case of "You get what you pay for". I am not able to test it, but I'm certain this meter will survive 600 volts without issue. How many cheap sub-$20 Chinese meters do you know that can do that? CLOSING THOUGHTS - To summarize, the Klein Tools MM300 is a competent and very well-built meter that also accomplishes this without draining your wallet. It does have its limitations like a slow response to continuity checks and limited battery life owing to its use of AAA cells instead of AA cells. But overall, I'd recommend this meter for the individual who is just starting out in his/her first electronics project or the intrepid do-it-yourself home handyman who just needs a basic no-frills multimeter that's also reasonably inexpensive, very robust and abides totally to safety codes and regulations and won't crap out after a year or two of use. ### ⭐⭐⭐⭐⭐ Feels solid, works great. *by B***G on February 16, 2022* For the price, I'm surprised at how good this feels. I need something I can depend on for work, but only need it a few times a year. I had an off-brand one I purchased a couple of years ago that didn't last for more than a few uses. This was only a couple of dollars more but feels way better. I really can't review the quality yet, I've only used it once, it will take time to know how good it really is, but the fact it's a Klein and because of the feel of it, I'm sure this will last for a long time. ### ⭐⭐⭐⭐⭐ It's a REAL meter! *by M***N on May 15, 2024* I had ordered a less expensive meter, and the lead terminals that plug into the unit fell apart. I was careful with it but that didn't matter. I have had this Klein meter for 2 years now and it never fails me! Would buy again. ## Frequently Bought Together - Klein Tools MM300 Multimeter, Digital Manual-Ranging Voltmeter, Tests Batteries, AC/DC, Current, Resistance, Diodes, and Continuity, 600V - Aenllosi Case for Klein Tools MM325/MM300/MM400/69355/69149P Electrical Test Kit with Digital Multimeter Temp 600V. - Klein Tools 69417 Rare-Earth Magnetic Hanger, with Strap --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ni/products/23796663-mm300](https://www.desertcart.ni/products/23796663-mm300) --- *Product available on Desertcart Nicaragua* *Store origin: NI* *Last updated: 2026-04-22*