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Klein Tools

Model # MM500

Internet # 204337793

Store SKU # 1000018130

Auto Ranging Digital Multimeter

This item has been discontinued.
The Home Depot no longer carries this specific product.

$39.98 /  each


Model # MM500

Internet # 204337793

Store SKU # 1000018130

The Klein Tools Auto Ranging multi-meter measures AC/DC Voltage, resistance and continuity. Its easy-to-use functionality saves times. The durability handles even the roughest of jobsite environments. The MM500 is the tough meter for your tough jobs.

  • User-friendly 3 button design to measure continuity, resistance and voltage
  • Voltage automatically detects AC or DC measures up to 750 Volt
  • Includes both visual and audible continuity indicators up to 25
  • Resistance range: 4000
  • Auto-hold captures the first stable displayed value
  • Other features include brighter display / back light, low battery indicator and auto power off
  • Home Depot Protection Plan:

    Home Depot Protection Plan

Info & Guides

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Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Audible Alert 
Auto Ranging 
Category Rating 
Control Type 
Data Log/Record 
Data hold 
Display Type 
Dual voltage indication 
Integral lead storage 
Interchangeable leads 
Noncontact detection 
Number of Functions 
Number of Ranges 
Product Weight (lb.) 
0.41 lb 
Reference Scale Included 
Test Meter Type 
Tools Product Type 
Test Meter 
Vibration Alert 
Visual Alert 
Voltage (volts) 
Warranty / Certifications
Manufacturer Warranty 
This product is warranted to be free from defects in materials and workmanship for a period of two years from the date of purchase. This warranty does not cover damage which occurs in shipment or failure which results from alteration, tampering, accident, misuse, abuse, neglect, or improper maintenance. 


Rated 4.6 out of 5 by 13 reviewers.
Rated 5.0 out of 5.0 by Very well thought out meter This meter will automatically sence A/C and D/C voltages and respond accordingly, this is a very convienient feature when working on power supplys and any equipment that has a mix of the two throughout the unit. It is very compact but tough and will fit in tight spaces. The test leads are high quality and have a comfortable semi soft grip that helps them stay where you want them to. The lighted display is easy to read and as accurite. December 6, 2013
Rated 5.0 out of 5.0 by KLEIN TOOLS MAKES EXCELLENT PRODUCTS Klein Tools makes excellent products and this multimeter is no exception. The auto ranging function of the MM500 multimeter saves time by allowing you to test AC voltages or DC voltages without having to set meter to type of voltage. The meter even has a function to save a reading so you can go back to it if need be. The MM500 is very rugged and seems to be able to stand up to years of use. December 6, 2013
Rated 5.0 out of 5.0 by Best Multimeter for me to use. For being a person who does not know about electricity for my home or my car, it's perfect. Just use it for a timer that I use for my fishtank. I notice the timer was not on. I started to use the multimeter to see if it had electricity. After a few minutes got every result I need. It did what It suppose to do. Thank you Klein May 18, 2015
Rated 4.0 out of 5.0 by Works as Advertised Don't have much experience with this tool but soooooo easy to use. Smart design all way around. Seems more durable than most. December 27, 2014
Rated 1.0 out of 5.0 by Piece of cheap junk Avoid this one. Takes a crowbar to pry off the battery cover March 19, 2015
Rated 5.0 out of 5.0 by Easy to Use and Tough I like the fact that it's easy to use, but I like the fact that it's tough even more. I've dropped other meters and broken them, but this meter stands up to my lack of coordination! October 2, 2013
Rated 5.0 out of 5.0 by Excellent Build Quality I have used a few multimeters in the past but never owned one. This one will likely be the only one I will need for a lifetime. It is lightweight and rugged. It is easy to use with auto-hold feature. It's easy to find with the bright orange body. Did I mention it was rugged? In a unique position as a tester, I put this unit under running water and dropped it repeatedly from 6' onto a concrete floor. Still looks and runs like new! This thing is robust! Built really well. December 4, 2013
Rated 5.0 out of 5.0 by I am not an electrician, but as a homeowner this device is very easy to operate compared to any other device I have found. I am not an electrician so I am not sure how professionals view this product, but as a home owner this device works great. Set it and forget it. It's not hard to test whatever it is your working on, from Christmas lights to irrigation this device works great. I would recommend purchasing this unit to anyone - electricians may have better units available but for the average consumer this is the one to buy. February 18, 2014
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