Klein Tools MM450 Multimeter is a TRMS auto-ranging slim multimeter that measures AC/DC voltage, AC/DC current, and resistance. It can also measure temperature, capacitance, frequency, duty-cycle, and test diodes and continuity. It features a high visibility, reverse contrast display with an optical sensor to automatically optimize viewing in dark or bright ambient light. The slim profile of the MM450 makes this meter almost the size of a cell phone and it conveniently fits into most pockets. The MM450 features the same quality leads you have come to expect from the Digital Multimeter line at Klein Tools. 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.
Klein Tools MM450 Multimeter is a TRMS auto-ranging slim multimeter that measures AC/DC voltage, AC/DC current, and resistance. It can also measure temperature, capacitance, frequency, duty-cycle, and test diodes and continuity. It features a high visibility, reverse contrast display with an optical sensor to automatically optimize viewing in dark or bright ambient light. The slim profile of the MM450 makes this meter almost the size of a cell phone and it conveniently fits into most pockets. The MM450 features the same quality leads you have come to expect from the Digital Multimeter line at Klein Tools. 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.
Klein Tools MM450 Multimeter is a TRMS auto-ranging slim multimeter that measures AC/DC voltage, AC/DC current, and resistance. It can also measure temperature, capacitance, frequency, duty-cycle, and test diodes and continuity. It features a high visibility, reverse contrast display with an optical sensor to automatically optimize viewing in dark or bright ambient light. The slim profile of the MM450 makes this meter almost the size of a cell phone and it conveniently fits into most pockets. The MM450 features the same quality leads you have come to expect from the Digital Multimeter line at Klein Tools. 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.
Klein Tools MM450 Multimeter is a TRMS auto-ranging slim multimeter that measures AC/DC voltage, AC/DC current, and resistance. It can also measure temperature, capacitance, frequency, duty-cycle, and test diodes and continuity. It features a high visibility, reverse contrast display with an optical sensor to automatically optimize viewing in dark or bright ambient light. The slim profile of the MM450 makes this meter almost the size of a cell phone and it conveniently fits into most pockets. The MM450 features the same quality leads you have come to expect from the Digital Multimeter line at Klein Tools. 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.
Last updated at 06/17/2026 23:17:41
Klein Tools MM450 Digital Multimeter – Slim TRMS Auto-Ranging Multimeter, Measures 600V AC/DC, 10A Current, Temperature, Capacitance & Frequency, Lead
Free delivery
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Klein Tools MM450 Slim Digital Multimeter, Reverse Contrast Display with Lead Alert, Auto-Ranging TRMS, 600V AC/DC Voltage, Curr
Delivery $28.49
Klein A-MM450 600V TRMS Auto-Ranging Slim Digital Multimeter
Free delivery between 23 June – 1 July
Klein Tools Mm450 Multimeter, Slim Digital Meter
Delivery $33.17
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Klein 600V 10A Acdc Autorange Trms Slim Mmeter - A-MM450
Free delivery between Mon – Tue
Klein A-MM450 600V TRMS Auto-Ranging Slim Digital Multimeter
Free delivery
KLEIN 600V 10A AC/DC Autorange TRMS Slim Mmeter A-MM450
Free delivery between 24–29 June
Klein Tools, Inc. MM450 SLIM DIGITAL MULTIMETER, TRMS
Free delivery between 24–30 June
600V POCKET DIGITAL MULTIMETER TRMS AUTO-RANGING
Delivery $15
Klein Tools MM450 Slim Digital Multimeter, Reverse Contrast Display with Lead...
Free delivery between 29 June – 2 July
originally posted on ebay.com
Excellent design and materials. Has more measurement modes than I will use.
originally posted on acmetools.com
Works better than expected I like it for an everyday meter to have in my tool pouch
originally posted on Ace Hardware
Great meter, fair price.
| Warranty | 12 Months |
Klein Tools MM450 Digital Multimeter – Slim TRMS Auto-Ranging Multimeter, Measures 600V AC/DC, 10A Current, Temperature, Capacitance & Frequency, Lead
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Klein Tools MM450 Slim Digital Multimeter, Reverse Contrast Display with Lead Alert, Auto-Ranging TRMS, 600V AC/DC Voltage, Curr
Delivery $28.49
Klein A-MM450 600V TRMS Auto-Ranging Slim Digital Multimeter
Free delivery between 23 June – 1 July
Klein Tools Mm450 Multimeter, Slim Digital Meter
Delivery $33.17
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Klein 600V 10A Acdc Autorange Trms Slim Mmeter - A-MM450
Free delivery between Mon – Tue
Excellent design and materials. Has more measurement modes than I will use.
Works better than expected I like it for an everyday meter to have in my tool pouch
Great meter, fair price.
Works perfectly!
I bought this primarily to use to measure Hetrz Frequency. After being unable to get any viable readings from our diesel generator nor our Honda Eu2000, I contacted the Klein Tools Customer Service - after 3 weeks of back and forth information I was advised by the Klein Tools Customer Svc Manager that "The MM600 is not a True RMS meter..." This is inconsistent with their advertisements and product information that is shown on numerous retailers websites......
Like the large screen and blue digits on black background in a compact meter. Like the side installed lead jacks with illuminated lead indicators and carrying case included. Only Issues are the screen isn't scratch resistant and the auto brightness doesn't seem to work. The optical Sensor doesn't increase the screen brightness in high ambient lighting but can be done manually. Other than those 2 issues it's 4 stars.
works great
| Warranty | 12 Months |
