Klein Auto-Ranging Digital Multimeter

SKU# MM400
MFR# MM400
  • Measures Up To 600V AC/DC Voltage, 10A AC/DC Current And 40 M? Resistance
  • Measures Temperature, Capacitance, Frequency, Duty-cycle, And Test Diodes And Continuity
  • CAT III 600V Safety Rating
  • Built To Withstand A 3.3-foot (1 M) Drop And Withstand Daily Wear And Tear On The Job Site
  • Low Battery Indicator And Easily Accessible Battery Compartment
  • For Use In Basic And Controlled Electromagnetic Environments Such As Residential, Business And Light-industrial Locations
  • Includes Test Leads, Thermocouple With Adapter And Batteries
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The MM400 is an Auto-Ranging Digital Multimeter from Klein Tools. This digital multimeter measures up to 600V AC/DC voltage, AC/DC current and resistance. It also measures temperature, capacitance, frequency, duty-cycle, and tests diodes and continuity. It includes test leads, batteries and thermocouple with adapter.


Measures up to 600V AC/DC voltage, 10A AC/DC current and 40MΩ resistance plus temperature, capacitance, frequency, duty-cycle, test diodes and continuity
CAT III 600V safety rating
Built to endure a 3.3' (1 m) drop and withstand daily wear and tear on the job site
Low battery indicator and easily accessible battery and fuse replacement compartment
For use in basic and controlled electromagnetic environments such as residential, business and light-industrial locations
Includes test leads, thermocouple with adapter and batteries

AC Current10A
AC MicroampsYes
AC MilliampsYes
Ac Voltage600V
Audible ContinuityYes
Auto RangingYes
Auto-Power OffYes
Capacitance Test200µF
DC Current10A
DC MicroampsYes
DC MilliampsYes
DC MillivoltsYes
DC Voltage600V
Data HoldYes
Diode TestYes
Drop Protection3.3 feet (1 m)
Frequency / Duty Cycle1Hz - 500 KHz
Ingress ProtectionNone
LCD Display Count4000
Lead WarningNo
Magnetic MountNo
# of Batteries2 x AAA
Ohms (Resistance)40MO
Range HoldYes
Safety RatingCAT III 600V
Temperature Range0° to 1000°F (-18° to 538°C)
Weight8.1 oz

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