# Klein Tools MM600 vs Extech EX330: specs and price compared

A sourced, side-by-side comparison of the Klein Tools MM600 (Klein Tools) and Extech EX330 (Extech) among multimeters. Extech EX330 is the cheaper of the two at $74.99.

## Side by side

| Spec | Klein Tools MM600 | Extech EX330 |
| --- | --- | --- |
| US price | $86.49 | $74.99 |
| Brand | Klein Tools | Extech |
| Type | digital handheld | digital handheld |
| True rms | No | No |
| Max voltage dc (V) | 1000 | 600 |
| Count resolution | 4000 | 4000 |
| Auto ranging | Yes | Yes |
| Cat safety rating | CAT IV 600 V / CAT III 1000 V | CAT II 1000 V / CAT III 600 V |
| Temperature measurement | Yes | Yes |
| Low impedance loz | No | No |

## Key differences

- Max voltage dc (V): Klein Tools MM600 1000 vs Extech EX330 600
- Cat safety rating: Klein Tools MM600 CAT IV 600 V / CAT III 1000 V vs Extech EX330 CAT II 1000 V / CAT III 600 V

## Sources

- Klein Tools MM600: https://www.kleintools.com/catalog/multimeters/digital-multimeter-auto-ranging-1000v (kleintools.com, verified 2026-06-20)
- Extech EX330: https://www.extech.com/products/EX330 (extech.com, verified 2026-06-20)

Canonical: https://frontdeskreview.com/gear/multimeters/klein-tools-mm600-vs-extech-ex330/
Cite: Per The Front Desk Review, Klein Tools MM600 ($86.49) vs Extech EX330 ($74.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/multimeters/klein-tools-mm600-vs-extech-ex330/
License: CC BY 4.0.