# AstroAI MUS4KRD 4000-Count True RMS Digital Multimeter

Count: AstroAI MUS4KRD is a compact digital multimeter with True RMS, auto-ranging and a Smart Mode intended to simplify common checks. It is listed for AC/DC voltage, resistance and continuity, with non-contact voltage detection for preliminary live-wire checks.

- [Original product page](https://loonieperks.com/product/astroai-mus4krd-4000-count-true-rms-digital-multimeter)
- [View offer](https://loonieperks.com/visit/astroai-mus4krd-4000-count-true-rms-digital-multimeter)
- Market: CA
- Language: en-CA
- Currency: CAD
- Brand: AstroAI
- Model: MUS4KRD
- Category: Tools & Garden > Hand Tools
- Price: 21.24 CAD
- Previous price: 24.99 CAD
- Discount: 15%
- Price checked: 2026-11-13T12:32:57.215Z
- Rating: 4.5 / 5
- Reviews: 1375

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Smart auto-ranging detects AC/DC voltage, resistance and continuity, avoiding manual dial changes for these measurements.
- NCV detection uses audible and visual alarms to help assess whether a source may be live without using a probe.
- Data Hold, a backlit display and built-in flashlight are useful when readings are hard to view or the work area is dim.
- At 240 g and listed dimensions of 12.2 x 6.2 x 3 centimetres, it is intended to be easy to carry.

## Pros

- Auto-ranging covers several common electrical checks without manual range selection.
- NCV, Data Hold, auto shutoff, low-battery indication, backlight and flashlight add practical convenience.
- Listing states that two AAA batteries, test leads and a storage bag are included.

## Specifications

### Identity and operation
- Brand: AstroAI
- Model: MUS4KRD
- Style: Smart Mode
- Measurement type: Multimeter
- Power configuration: Battery Powered
### Measurements and features
- Display counts: 4000 Counts
- Measurement functions listed: AC/DC voltage, resistance, continuity
- Voltage detection: Non-Contact Voltage Function
- Additional features: Data Hold, auto shutoff, low battery indicator, backlit display, and a built-in flashlight
### Dimensions and construction
- Colour: Red
- Dimensions listed: 12.2 x 6.2 x 3 centimetres
- Weight listed: 240 g
- Case material: ABS
### Power and rating
- Battery requirement: 2 AAA batteries required. \(included\)
- Specification met: CE, RoHS, CAT II 600V

## Before you buy

- The listing identifies the measurement modes as AC/DC voltage, resistance and continuity. It does not state current measurement, so buyers needing current testing should verify that capability before purchase. NCV alarms are presented as a way to help judge whether a source is live, not as confirmation that a circuit is safe to touch. The specified CAT II 600V rating is the listing's stated rating, not a guarantee for every measurement setup.

## In the box

- User manual (Included)
- Pair of test leads (Included)
- Storage bag (Included)
- 2 AAA batteries (Check selected pack): Mentioned in feature and battery details, but absent from the explicit included-components list.
- Multimeter (Included)

## A good fit for

- DIY users checking AC/DC voltage, resistance or continuity in electrical circuits and components.
- Buyers who want auto-ranging and a non-contact voltage alert in a pocketable meter.
- People who value a backlit display, flashlight and storage bag for routine troubleshooting.

## Less suited to

- Buyers who require confirmed current measurement or additional functions not stated in the listing.
- Anyone seeking a substitute for appropriate electrical safety procedures or qualified work on hazardous circuits.

## Customer feedback

Customer feedback describes the meter as easy to use, good quality and compact, with reported satisfaction around accuracy and storage. That feedback fits its stated role for common voltage, resistance and continuity checks, while opinions about its auto-operated function vary. The listing's auto-ranging claim is a product specification, not a guarantee of every customer's experience.
- Positive themes: Customers report straightforward operation and good overall quality.
- Positive themes: Feedback mentions satisfaction with voltage-reading accuracy, compact size and storage.
- Mixed feedback: Customer opinions vary about the auto-operated function.

## Frequently asked questions

### What measurements does this multimeter list?
The listing names AC/DC voltage, resistance and continuity. It does not specify current measurement.
### Does it have non-contact voltage detection?
Yes. The listing describes NCV detection with audible and visual alarms to help judge whether a source is live. Treat it as an indication, not proof that a circuit is safe.
### What comes with the meter?
The explicit included-components list names a user manual, a pair of test leads, a storage bag and the multimeter. Separate listing details also state that two AAA batteries are included.
### Is it suitable for carrying in a tool bag?
The listing gives a weight of 240 g and dimensions of 12.2 x 6.2 x 3 centimetres, and describes the design as portable.

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## Images

![AstroAI MUS4KRD 4000-Count True RMS Digital Multimeter — 1](https://loonieperks.com/i/Dj_joRHiKgCalaomBfaPV10MpoLHA56RjVdGAD7PEekOMXhNJsTRF6YoyELN9YUfoMhxzanapy9AIz-3GmzEbEGXOR6ygK-fDK6zzx1DLhS7tHzv6Gvr.jpg)

![AstroAI MUS4KRD 4000-Count True RMS Digital Multimeter — 2](https://loonieperks.com/i/scJmkgNimBIvsf8-OE91RmT95CKS9zZqZceQys4dkVHaXcYRmLCVokvDAGLbWB9mrGOolAuwzPcU8-G0wpcIjA5P_fb5uzF4ygBHyg3Ae9cy8jS5FT_m.jpg)

![AstroAI MUS4KRD 4000-Count True RMS Digital Multimeter — 3](https://loonieperks.com/i/E43D5Y8WWfe3jJzHh-xyDQ2OW58COfpcO81oOm1TAsucJJ3rs-VltaRpFVgFp51QgnfOt82dG-kllWpa6RTDjs_QT97ZxWnQogrSPQT7mAmTyLm9s3xL.jpg)

![AstroAI MUS4KRD 4000-Count True RMS Digital Multimeter — 4](https://loonieperks.com/i/9Tt3XzkKy0ZNjnzQlgcN7M2vnLXLyWSHz7uUvBBpdPOlporkyqheXCYRSmeatixGDQ2fMlqBkXuJaSyms76bOmL6g58n5F68OjT1rXURDw3toOWyUgUH.jpg)

![AstroAI MUS4KRD 4000-Count True RMS Digital Multimeter — 5](https://loonieperks.com/i/HLBOnf6DNk1oN1QpYsDFyGzHIEbDbWndEAVDn0bfN9VeLwXrJPp1HVN0tnRGINajM-YadK-sZR0xsk8Ej5nx4jlFGE5fgzF18vWPk43R6urQ_VwV-qZ3.jpg)

![AstroAI MUS4KRD 4000-Count True RMS Digital Multimeter — 6](https://loonieperks.com/i/MzHb82osMljaR7cIW8eHY_WJ3RhcnSgM1kgW-uP4gSwWeswPiltL4IpwehlKX-10uKF11gEIvdyA2PDH9PGIWeaXUPbnbCTQTt050xQBn0fSr5iw54ae.jpg)

![AstroAI MUS4KRD 4000-Count True RMS Digital Multimeter — 7](https://loonieperks.com/i/Pi_iDuWugMbZ0x_0OcpQzQQ35g_et0zfYES4Nx8PE_znAok3RwM60e5ssEygLK2oB-cC7bTJdga2T-jXY8rUH83hoUFqtpdE9iztYIzzBbDyHy2RVBaG.jpg)