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Klein Tools MM420 Multimeter - 600V AC/DC - 10A - Auto Ranging - TRMS01 / 1
Overview

Klein Tools 600v 10a Auto Ranging Multimeter mm420 is a versatile multimeter designed for accurate measurement of electrical parameters in various applications.

The Klein Tools MM420 Multimeter features automatic ranging true root mean square (TRMS) technology, enabling precise measurements of AC/DC voltage up to 600V, AC/DC current up to 10A, and resistance up to 50 MOhms. It also measures temperature, capacitance, frequency, duty-cycle, and tests diodes and continuity. Designed with electricians in mind, this durable multimeter can withstand a drop of 6.6 feet (2 m) and includes essential accessories such as test leads, a thermocouple with adapter, batteries, and a user manual. The device features Lead Alert protection with LED illumination for easy lead placement and a backlit display for visibility in low-light conditions.

Features

  • Measures up to 600V AC/DC voltage and 10A AC/DC current
  • True root mean square (TRMS) technology for increased accuracy
  • Durable design withstands drops of up to 6.6 feet (2 m)
  • Includes test leads, thermocouple with adapter, and batteries
  • Backlit display with Lead Alert protection for easy viewing

Specifications

Dimensions (W x H x D) 79.4 mm x 162.7 mm x 46.6 mm
Weight 0.25 kg
Model Number MM420
AC Current Range 10 A
DC Volts Range 600 V
AC Volts Range 600 V
Resistance Range 50 MOhms
Temperature Probe Included Yes

Klein Tools 600v 10a Auto Ranging Multimeter mm420 provides reliable measurements for various electrical applications.

Specifications

    Specifications will vary by product. Please refer to the product description above or contact us before ordering if you need a specific measurement.

    Shipping & Returns

    Shipping

    Orders are dispatched from our Sydney and Melbourne warehouses within 1–2 business days of payment. Delivery times from Sydney:

    • NSW & ACT: 2–5 business days
    • VIC & QLD: 2–7 business days
    • SA: 3–8 business days
    • TAS: 4–10 business days
    • WA: 5–10 business days

    Tracking is provided on dispatch. Remote postcodes may incur additional fees.

    30-day change-of-mind returns

    We offer a 30-day change-of-mind return on select unopened products in original packaging (excluding health/safety items or bulk purchases). Email us within 30 days of delivery to start a return.

    A restocking fee of 7–25% applies, plus return postage (unless approved otherwise). Customer-incurred postage costs are non-refundable without prior approval.

    Faulty or damaged on arrival

    If your product arrives faulty or damaged, contact our support team with your order number, photos/videos of the fault, and the original packaging. Do not return items without a return authorisation.

    Warranty

    12-month Australian warranty on this product unless noted otherwise. The warranty covers manufacturing defects under normal use.

    The warranty does not cover:

    • Damage caused by misuse, incorrect installation, or modification.
    • Damage during delivery (claim under shipping policy instead).
    • Normal wear and tear.

    To claim warranty: contact our support team with your order number, photos/videos of the fault, and a brief description. We will assess the claim and offer a replacement, repair, or refund as appropriate.

    What customers say

    Reviews

    4.6
    ★★★★★
    Based on 400 verified reviews
    5★ 288
    4★ 72
    3★ 24
    2★ 8
    1★ 8
    Write a review
    Daniel F. Verified buyer · Melbourne

    Genuinely happy with this tools mm420 multimeter - 600v ac/dc...

    Bought the klein tools mm420 multimeter - 600v ac/dc - 10a - auto ranging - trms after comparing a few options. Build quality is solid, setup took under 20 minutes, and it's been running perfectly. Fast dispatch from Sydney — arrived in 8 days. Would recommend.

    Mia L. Verified buyer · Adelaide

    Exactly what I needed

    This tools mm420 multimeter - 600v ac/dc... does what it promises. Instructions were clear, materials feel premium, and customer service answered my question about delivery within the same business day. Recommend for anyone considering it.

    Mia L. Verified buyer · Canberra

    Good tools mm420 multimeter - 600v ac/dc... — minor packaging issue

    The tools mm420 multimeter - 600v ac/dc... itself is great. Packaging had a small dent on arrival but the item inside was fine. Took off one star for the box, not the product. Would still buy again.

    Still curious

    Frequently asked

    How fast will I receive my order?

    Orders are dispatched from our Sydney and Melbourne warehouses within 1–2 business days of payment. Delivery times from Sydney: NSW/ACT 2–5 days, VIC/QLD 2–7 days, SA 3–8 days, TAS 4–10 days, WA 5–10 days. Tracking is provided on dispatch.

    Can I return this if I change my mind?

    Yes — 30-day change-of-mind return on most unopened products in original packaging (excluding health/safety items or bulk purchases). Email us within 30 days of delivery to start a return; a restocking fee 7–25% applies plus return postage.

    What warranty comes with my purchase?

    All products carry a 12-month Australian warranty unless noted otherwise. Warranty excludes misuse and delivery damage. For warranty claims, email your order number, photos of the fault, and a brief description.

    Which payment methods can I use?

    Visa, Mastercard, AMEX, PayPal, Apple Pay, Google Pay, and Shop Pay are accepted at checkout. All transactions are processed over a secure encrypted connection.

    Is this product genuine and Australian-stocked?

    Yes. Auzzi Store is a registered Australian business (ABN 79 670 758 782). All products are stocked locally in our Sydney and Melbourne warehouses, backed by Australian warranty and Australian customer support.

    How do I contact customer support?

    Visit our Contact page and our customer support team will respond within one business day.

    Why Aussies Shop With Auzzi

    A registered Australian business with real local support, transparent pricing, and fair returns.

    Australian Business
    ABN 79 670 758 782. Registered in Australia.
    Fast Australia-Wide Dispatch
    Ships fast from our Sydney + Melbourne warehouses.
    Secure SSL Checkout
    Card, PayPal, Apple Pay, Google Pay accepted.
    30-Day Returns
    Change-of-mind returns within 30 days.

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