The Klein Tools MM720 is a True RMS auto-ranging digital multimeter rated CAT IV 600V / CAT III 1000V with IP42 ingress protection. It measures AC/DC voltage up to 1000V, AC/DC current up to 10A, resistance to 60 MΩ, capacitance to 6000 µF, frequency, duty-cycle, and temperature. Low impedance (LoZ) mode eliminates ghost voltage readings. The 6000-count LCD display features an optical sensor that automatically adjusts contrast for ambient lighting. Built to withstand a 6.6-foot drop. Backed by Klein Tools' 1-year limited warranty.
What does Low Impedance (LoZ) mode do?
LoZ mode reduces input impedance to drain off phantom voltages induced on de-energized conductors. If you're reading 3–20V on a wire you've confirmed is off, switch to LoZ — a ghost voltage drops toward zero while actual voltage remains. Reviewers specifically call this out as essential for troubleshooting modern residential wiring.
How does the MM720 compare to a Fluke?
Multiple reviewers switched from Fluke and report comparable accuracy, similar durability, and a reverse-contrast display that auto-adjusts to lighting as a specific advantage over equivalent Fluke meters — at a significantly lower price. One reviewer preferred it for EV diagnostics over their lab-grade meter.
What is the reverse-contrast display with optical sensor?
A negative-filter LCD (white text on dark background) that automatically adjusts brightness based on ambient light. Reviewers call it easier to read in bright outdoor environments and dim panel interiors compared to standard positive LCD displays.
Is the MM720 rated for EV or high-voltage work?
Yes — 1000V AC/DC covers EV battery pack diagnostics. The dual CAT IV 600V / CAT III 1000V rating also covers utility-side service entrance work, making it one of the safest-rated meters in Klein's lineup.
What does the 6000-count display mean?
A 6000-count meter resolves readings to the nearest digit in a 0–6000 range — finer precision than the 600-count displays on basic meters. This matters for low-resistance measurements and precision voltage verification.
Does it auto-power off?
Yes — defaults to 5-minute auto-off, which can be disabled through a menu setting. Reviewers doing long panel sessions note this setting change and recommend it for continuous monitoring tasks.
# Klein Tools® MM720 Digital Multimeter, TRMS Auto-Ranging, 1000V, Temp, Low Impedance **Model:** `MM720` **Brand:** Klein Tools **Category:** Multimeter > The Klein Tools MM720 is a True RMS auto-ranging digital multimeter rated CAT IV 600V / CAT III 1000V with IP42 ingress protection. It measures AC/DC voltage up to 1000V, AC/DC current up to 10A, resistance to 60 MΩ, capacitance to 6000 µF, frequency, duty-cycle, and temperature. Low impedance (LoZ) mode eliminates ghost voltage readings. The 6000-count LCD display features an optical sensor that automatically adjusts contrast for ambient lighting. Built to withstand a 6.6-foot drop. Backed by Klein Tools' 1-year limited warranty. ## Specifications | Attribute | Value | |---|---| | Product Type | Digital Multimeter | | True Rms | Yes | | Auto Ranging | Yes | | Voltage Range Ac | 1000V AC | | Voltage Range Dc | 1000V DC | | Current Range Ac | 10A AC | | Current Range Dc | 10A DC | | Resistance Range | 60 MΩ | | Capacitance Range | 6000 µF | | Frequency Range | 1 Hz – 500 KHz | | Temperature Range | -40–1832°F (-40–1000°C) | | Low Impedance Loz | Yes | | Nist Calibrated | No | | Display Type | LCD | | Display Count | 6,000 | | Cat Rating | CAT IV 600V; CAT III 1000V | | Ip Rating | IP42 | | Battery Type | 2 x AAA | | Overall Length In | 6.94 | | Assembled Weight Oz | 12.2 | | Barcode (UPC) | 092644693762 | | Warranty | 1-year limited | ## What's Included - Multimeter - Carrying case - Test leads with safety caps - Thermocouple - Instructions - 2 x AAA batteries Source: https://www.jaspecs.com/klein-tools/multimeter/mm720-klein-tools-digital-multimeter-trms-auto-ranging-1000v-temp-low-impedance/