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Description
MAJ MT21DMM Data Hold AC DC 600V CAT 111 DMM Data Hold AC DC 600V CAT 111 Overview The MT21 is a 600 AC DC Voltage Compact Multimeter with double moulded rubber housing and meets the International Standard IEC 61010 1 CAT lll 600V. The large LCD display screen has a white backlight for use in arduous areas. It is a very economical tester ideally suited for everyday use by electricians, electronic technicians as well as the air conditioning industry. The MT21
DMM Data Hold AC/DC 600V CAT 111
DMM Data Hold AC/DC 600V CAT 111
Overview
The MT21 is a 600 AC/DC Voltage Compact Multimeter with double moulded rubber housing and meets the International Standard IEC-61010-1 CAT lll 600V. The large LCD display screen has a white backlight for use in arduous areas. It is a very economical tester ideally suited for everyday use by electricians, electronic technicians as well as the air conditioning industry. The MT21 is a basic 2000 count multimeter and is designed to efficiently support the first level electronic and electrical trouble shooting. The meter measures AC and DC voltage to 600V, resistance to 2000 ohms, and DC current to 10A, plus has a diode test function and a continuity buzzer. An added function of the MT21 is the battery test ranges, which test 1,5V and 9V batteries with a load.
Features
- 600V AC/DC Voltage
- 10A DC Current
- Resistance to 2000k
- Battery Test 1.5V & 9V Batteries
- 2000 Count LCD Display
- Overmould Rubber Housing
- Integrated Test Lead Holder
Accessories:
- 9V Battery
- Test Leads
- Instruction Manual
Specifications
| Function | Range | Resolution | Accuracy |
| DC voltage | 200mV - 600V | 0.1mV | ± (0.8% + 2 Digits) |
| AC voltage | 200V - 600V | 0.1mV | ± (1.2% + 10 Digits) |
| DC Current | 2000μA - 10A | 1mA | ± (2.5% + 5 Digits) |
| Resistance | 200Ω - 2000kΩ | 0.1Ω | ± (1.0% + 2 Digits) |
| Pulse Width |  | 10mV | ± (1.0% + 2 Digits) |
| AC Bandwidth | 45Hz to 450Hz | ||
| Digital display | 2000 | ||
| Continuity | Yes | ||
| Diode test | Yes | ||
| Overrange indication | Yes | ||
| Battery test | 9V, 1.5V | ||
| Input impedance | >1MΩ | ||
| Enclosure | Double moulded | ||
| Low battery indication | Yes | ||
| Power source | 6LF22 | ||
| Weight | 342g | ||
| Dimensions | 187 x 81 x 51mm | ||
| Safety Specs | IEC61010-1 CAT III 600V | ||
Downloads
Additional Information
| Group | Multimeters |
| Keywords | major tech, MT21, digital multimeter, multimeter, Compact |
| Sub Group | Digital Multimeters |
| Device | Multimeter |
| Type | DMM | Data Hold |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.0 ★★★★★
Based on 2401 reviews
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Product Reviews
★★★★★ 5
Great shelves
Size: 24 Inch, Color: White
Easy to assemble and comes with everything you need for drywall or wood. Nice color and texture and comes with stickers to hide the holes underneath. I bought two sets of three. These are very long, so I recommend just using two at a time.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 8, 2026
★★★★★ 5
Beautiful, sturdy shelves — perfect for any room!
Size: 15.6 inch, Color: White, Size: 15.6 inch, Color: White
These 16-inch solid wood floating shelves exceeded my expectations. The quality of the wood is excellent — thick, smooth, and very sturdy. They were easy to install, and all the hardware was included. Once mounted, they feel secure and can hold a good amount of weight without sagging.
I love how they add a clean, modern touch to the room. I’ve used them to display small framed photos, books, and decor items in my living room, and they look fantastic. The small ledge is a nice feature too — it keeps things from sliding off easily.
Great for any space — bedroom, kitchen, hallway — and they’re both functional and stylish. Highly recommended!
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Reviewed in the United States on July 13, 2025
★★★★★ 5
Perfect shelf
Size: 15.6 inch, Color: White
They look as pictured. The white is nice. These are sturdy and easy to hang. I was worried because I have not had luck with hanging shelves in the past but these were great. Would definitely recommend.
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Reviewed in the United States on May 11, 2026
★★★★★ 5
Stylish and Pratical
Size: 15.6 inch, Color: Black
The LaVie Home Floating Shelves are an outstanding addition to my office! This set of four 16-inch picture ledge shelves is not only stylish but incredibly functional.
One of the best features is the front ledge design, which keeps items securely in place and prevents anything from falling off. It’s perfect for displaying photos, books, or decorative pieces without worrying about them sliding off.
Installation was a breeze—the shelves come with clear instructions and all the necessary hardware, making the process quick and hassle-free. They feel sturdy once mounted and add a clean, modern touch to any room.
These shelves offer the perfect balance between aesthetics and practicality. If you’re looking for easy-to-install, high-quality wall storage, these are an excellent choice.
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Reviewed in the United States on December 26, 2024
★★★★★ 4
Almost perfect
Love these shelves. They were easy to put up. Gave them 4 stars because they don’t have the stickers to cover their screw holes.
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Reviewed in the United States on June 10, 2025
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