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Klein Tools - For Professionals Since 1857

Slim Digital Multimeter, TRMS Auto-Ranging, 600V, Temp


  • Multimeter with automatic ranging true root mean square (TRMS) technology for increased accuracy
  • Measures up to 600V AC/DC voltage, 10A AC/DC current and 50 MΩ resistance, continuity, temperature, capacitance, frequency, duty-cycle, and test diodes
  • High visibility, reverse contrast display with automatic backlight adjustment
  • Lead-Alert protection with LEDs for test lead placement
  • Slim profile allows multimeter to conveniently fit into most pockets
  • Low battery indicator and easily accessible battery and fuse compartment
  • Durable meter built to withstand a 6.6-Foot (2 m) drop
  • Includes carrying pouch, safety rated CAT III 1000V/CAT IV 600V test leads, thermocouple with adapter and 2 x AAA batteries
  • CAT III 600V safety rating
  • For use in basic and controlled electromagnetic environments such as residential, business and light-industrial locations
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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.

Digital Multimeter
Testing and Measuring Voltage
Special Features:
Slim Profile; Lead-Alert; High-Visibility Display with Optical Sensor; Auto-Range; Min/Max Measurements; Auto Power-Off; Data-Hold
ABS, Electrical Components
2 x AAA
Drop Protection:
6.6' (2 m)
4000 Count LCD
Auto Power-Off; Data Hold; Auto-Range Mode; Min/Max Value of Measurement; Backlight; Lead Alert
600V AC/DC
1 Hz to 50 KHz
400 µF
Ohms (Resistance):
50 MΩ
CAT III 600V; CE and UKCA Certified
Temperature Range:
-40° to 1832°F (-40° to 1000°C)
Carrying Pouch, Test Leads, Thermocouple with Adapter, Batteries
Overall Length:
6.5'' (16.5 cm)
Overall Height:
1.09'' (2.8 cm)
Overall Width:
3.14'' (8 cm)
9.1 oz (258 g)
Additional Information
  • Read, understand and follow all instructions, cautions and warnings attached to and /or packed with all test and measurement devices before each use.
  • Do not use the meter during electrical storms or in wet weather, and do not use the meter or test leads if they appear to be damaged.
  • Before each use verify meter operation by measuring a known voltage or current.
  • Use personal protective equipment to prevent shock and arc blast injury where hazardous live conductors are exposed.