Klein Tools MM450 multimeter
Checked 2026-10-17 against Klein Tools' US product page by Rob, licensed electrician
The Klein Tools MM450 is a multimeter, sold on its own. Klein Tools publishes CAT III 600 V safety rating, 600 V DC voltage (max range), 600 V AC voltage (max range), 10 A AC current (max range). In the box: Multimeter, Carrying Case, Test Leads with CAT III/CAT IV Safety Caps, Thermocouple, Instructions, 2 x AAA Batteries. Source: Klein Tools' US product page, checked 2026-10-17.
Key specs
- Safety rating (IEC 61010 CAT)
- CAT III 600 V
- DC voltage, max range
- 600 V
- AC voltage, max range
- 600 V
- AC current, max range
- 10 A
- DC current, max range
- 10 A
- True-RMS
- Yes
- Display resolution
- 4,000 counts
- Resistance, max range
- 50 MΩ
- Batteries (cells)
- 2 x AAA
Not on Klein Tools' US product page for the MM450: Low-impedance (LoZ) mode; Warranty. We do not guess.
In the box
- IncludedMultimeter: Multimeter
- IncludedTest leads: Test Leads with CAT III/CAT IV Safety Caps
- IncludedBatteries: 2 x AAA Batteries
- IncludedCase or holster: Carrying Case
- IncludedAlso in the box: Thermocouple
Paid link: we may earn a commission.
Find MM450 prices on Amazon Find MM450 prices at Acme Tools Find MM450 prices at eBay New tab, US retailers. Search results open where no exact listing is on file. Check the listing says MM450; marketplace sellers vary.- US retailer, ships from the US
- Free shipping over $199
- Family owned since 1948
- Acme Tools, as published on its site, checked 2026-10-17
All specs
| Safety rating (IEC 61010 CAT) | CAT III 600 V |
| DC voltage, max range | 600 V |
| AC voltage, max range | 600 V |
| AC current, max range | 10 A |
| DC current, max range | 10 A |
| True-RMS | Yes |
| Display resolution | 4,000 counts |
| Resistance, max range | 50 MΩ |
| Batteries (cells) | 2 x AAA |
| Capacitance, max range | 400 μF |
| Frequency, max range | 50 kHz |
| Temperature measurement | -40° to 1,832°F (-40° to 1,000°C) |
| Min/Max recording | Yes |
| Drop protection | 6.6 ft (2 m) |
| Size | 6.5 x 3.14 x 1.09 in (L x W x H) |
| Weight | 9.1 oz (258 g) |
| UPC barcode | 092644693755 |
Ratings are Klein Tools' published figures from its US product page, listed under Sources. Anything not on that page is left out rather than guessed. Check this against another model.
Paid link: we may earn a commission.
Find the MM450 at Amazon
Quick answers
What is the MM450's safety (CAT) rating?
Klein Tools rates it CAT III 600 V. CAT IV covers the service entrance and utility side, CAT III distribution-level circuits such as panels and feeders; the lower of the meter's and the test leads' ratings is the one that applies. See our CAT ratings guide.
Does the MM450 measure DC current?
Yes: Klein Tools lists a DC current range up to 10 A.
Is the MM450 true-RMS?
Yes, Klein Tools lists it as true-RMS, so readings on non-sinusoidal loads (drives, dimmers, electronic ballasts) are not averaged.
What batteries does the MM450 use?
2 x AAA (dry cells; no tool battery platform).
Does the MM450 come with test leads?
Yes: Test Leads with CAT III/CAT IV Safety Caps.
Owner reviews
Read the owner reviews on KleinTools.com
Videos from Klein Tools
Manuals and official documents
Sources
- Klein Tools US product page MM450, retrieved 2026-10-17
Spotted a wrong number? Report a spec error (opens an email with the model filled in). We re-check against the maker's page and correct the page.
Researched by Rob, licensed electrician (Australia). Found an error? Tell us.
We may earn a commission if you buy through our links. Retailer links are paid links; commission never changes what we publish. As an Amazon Associate, The Pro Verdict earns from qualifying purchases. Affiliate disclosure.