The Klein Tools MM300 is a manual-ranging digital multimeter rated CAT III 600V intended for basic electrical testing. It measures AC/DC voltage up to 600V, DC current up to 10A, and resistance up to 20 MΩ. The 2000-count LCD display is straightforward to read, and the meter also performs battery, diode, and continuity tests. With a 3.3-foot drop rating and compact dimensions, it suits everyday residential and light commercial use. This product has been discontinued; the MM325 is the current replacement. Backed by Klein Tools' 1-year limited warranty.
Is the MM300 still available?
No — the MM300 has been discontinued. The MM325 is the current manual-ranging equivalent.
What was the MM300?
A manual-ranging average-sensing multimeter rated for 600V — offered explicit range control for users who preferred not to rely on auto-ranging.
What replaced it?
The MM325 is the current manual-ranging 600V multimeter in Klein's lineup.
# Klein Tools® MM300 Digital Multimeter, Manual-Ranging, 600V **Model:** `MM300` **Brand:** Klein Tools **Category:** Multimeter > The Klein Tools MM300 is a manual-ranging digital multimeter rated CAT III 600V intended for basic electrical testing. It measures AC/DC voltage up to 600V, DC current up to 10A, and resistance up to 20 MΩ. The 2000-count LCD display is straightforward to read, and the meter also performs battery, diode, and continuity tests. With a 3.3-foot drop rating and compact dimensions, it suits everyday residential and light commercial use. This product has been discontinued; the MM325 is the current replacement. Backed by Klein Tools' 1-year limited warranty. ## Specifications | Attribute | Value | |---|---| | Product Type | Digital Multimeter | | True Rms | No | | Auto Ranging | No | | Voltage Range Ac | 600V AC | | Voltage Range Dc | 600V DC | | Current Range Dc | 10A DC | | Resistance Range | 20 MΩ | | Low Impedance Loz | No | | Nist Calibrated | No | | Display Type | LCD | | Display Count | 2,000 | | Cat Rating | CAT III 600V | | Battery Type | 2 x AAA | | Overall Length In | 6 | | Assembled Weight Oz | 8.2 | | Barcode (UPC) | 092644690198 | | Warranty | 1-year limited | ## What's Included - Test leads - Batteries - User manual Source: https://www.jaspecs.com/klein-tools/multimeter/mm300-klein-tools-digital-multimeter-manual-ranging-600v/