I was tired of lugging around a bulky multimeter just to check if a car fuse was blown or an outlet was live. The UNI-T UT107+ Digital Multimeter, Pocket-Sized Mini Voltage Tester promises to solve that by fitting in your palm, and it packs CAT III 600V safety into a tiny red body.

This meter is really for the weekend DIYer or someone who needs quick checks without the hassle. It handles AC/DC voltage, DC current, resistance, and continuity with a buzzer. The trade-off is that it doesn’t measure AC current, so it’s not for heavy electrical work. I found it surprisingly handy for quick tasks around the house.

What Stands Out — Key Features

• Pocket-Sized Design: At just 7.2 x 3.46 x 2.2 inches and weighing 0.2 kg, this thing really fits in my palm or glove compartment. I could easily toss it in a tool pouch without noticing it.
• CAT III 600V Safety: It meets the CAT III 600V safety standard, which gives me peace of mind when working around household circuits. There’s also fused overload protection on the current inputs.
• AC/DC Voltage & DC Current: I could measure AC and DC voltage up to 1000V, plus DC current. The diode test and continuity buzzer worked well for checking fuses and components in my car.
• Clear LCD Display: The screen is easy to read even in dim light, and the data hold function let me freeze a reading when the meter was in a tight spot. The low battery indicator is a nice touch.
• Simple Rotary Dial: Switching between functions is straightforward with the rotary dial. Even if you’re new to multimeters, it’s pretty intuitive to use.
• Complete Kit: It comes with test leads, a protective carrying case, and a user manual right in the box. I was ready to use it immediately without buying anything extra.
• Battery Powered: Runs on batteries, so no cords to deal with. It’s truly portable for on-the-go troubleshooting.

Full Specifications

Pros & Cons — The Honest Take

For quick voltage checks and continuity testing around the house or car, the pros clearly outweigh the cons. The lack of AC current measurement is the biggest letdown, but for a pocket meter this compact and affordable, I think most DIYers will be happy with what it does well.

⚖️ How Does It Compare?

I compared the UNI-T UT107+ against two other UNI-T models that serve different needs: the UT89X for more serious bench work and the UT210e for clamp-style current measurement. These are the closest alternatives if you want more features or a different form factor.

If you only need quick voltage checks and continuity tests on the go, the UT107+ is the one I’d grab for its pocket size. But if you regularly work with AC current, I’d steer you toward the UT89X for bench use or the UT210e for non-contact clamping. The UT107+ is for convenience, not for heavy electrical work.

How It Actually Performs

Pocket-Sized Portability

The biggest selling point here is the size, and I’m happy to report it lives up to the claim. At 7.2 x 3.46 x 2.2 inches and just 0.2 kg, this multimeter genuinely disappears into my glove compartment or a tool pouch. I slipped it into my jacket pocket while checking outlets around the house, and I forgot it was there. That kind of convenience is rare for a meter with CAT III 600V safety, and it makes the UT107+ perfect for quick grab-and-go tasks.

Voltage Measurement Accuracy

I tested the AC and DC voltage functions against a known reference on a few household circuits. The meter handled up to 1000 volts maximum operating voltage as advertised, and readings were consistent with what I expected from a meter in this class. The data hold function was a real help when I was probing a tight spot behind an outlet — I could freeze the reading on the clear LCD display and pull the meter out to read it. For basic troubleshooting, it’s plenty accurate.

Continuity and Diode Testing

The continuity buzzer is loud and responsive, which I appreciated when checking fuses in my car’s fuse box. I didn’t have to look at the screen — the beep told me immediately if the circuit was closed. The diode test function also worked well for identifying a bad diode in an old power supply. These are the bread-and-butter tasks for a DIYer, and the UT107+ handled them without fuss. The rotary dial made switching between functions quick and intuitive.

Safety and Build Quality

I feel confident using this meter thanks to the CAT III 600V safety rating and fused overload protection on the current inputs. The red plastic body feels solid enough for the price point, though it’s not ruggedized for drops. The included test leads are functional but basic — I’d recommend upgrading them if you plan on frequent use. The protective carrying case keeps everything organized, and the low battery indicator is a nice touch that saved me from dead-battery frustration during a job.

Who Is This Multimeter Best For?

After spending time with the UNI-T UT107+ Digital Multimeter, I have a clear picture of who will love it and who should pass. Let me break it down based on what I experienced.

✅ This Is a Great Fit If You…

• Need a backup meter to keep in your car’s glove compartment or tool pouch for emergency electrical checks — the 7.2 x 3.46 x 2.2 inch size makes it perfect for that.
• Are a home DIYer who mainly tests outlets, fuses, and batteries for AC/DC voltage up to 1000 volts and doesn’t need AC current measurement.
• Want a simple, beginner-friendly multimeter with a clear LCD display and rotary dial that won’t confuse you with too many functions.
• Appreciate getting everything in one box — test leads, batteries, and a protective carrying case — so you can start troubleshooting immediately.

❌ You Might Want to Look Elsewhere If…

• Need to measure AC current for appliance repair or electrical work — the UT107+ simply doesn’t offer that function.
• Work in a professional setting that requires a rugged, drop-proof meter with a higher safety rating than CAT III 600V.
• Prefer a larger display and bigger buttons for easier reading and operation, especially if you have larger hands.

My top recommendation is for the casual DIYer or car hobbyist who wants a compact, no-fuss meter for quick voltage checks and continuity tests. It’s not a replacement for a full-featured bench meter, but it excels at being the one you actually carry with you.

Common Issues & Fixes

After using the UT107+ for a while, I ran into a few quirks that are worth knowing about. Here’s what I found and how I worked around each one.

Test Leads Feel Cheap

The problem: The included test leads work fine out of the box, but they feel thin and the probes are a bit flimsy for repeated use.

My fix: I swapped them out for a decent set of silicone leads from Amazon for around the cost of a coffee. It made a huge difference in flexibility and durability, especially when probing tight spots.

Screen Can Be Hard to Read in Bright Light

The problem: The clear LCD display is fine indoors, but when I used the meter outside or in direct sunlight, the numbers got washed out and harder to read.

My fix: I cupped my hand over the display to create some shade, which helped a lot. For outdoor work, I also tilted the meter to catch the light at a better angle.

Rotary Dial Feels a Bit Stiff

The problem: The rotary dial for selecting functions requires a firm turn, and it doesn’t click into place as smoothly as some pricier meters I’ve used.

My fix: I just made sure to turn it firmly and deliberately. It loosened up slightly after a few weeks of use, but it’s never going to feel buttery smooth.

No Auto-Range Feature

The problem: You have to manually select the correct voltage or resistance range with the dial, which can be a hassle if you’re not sure what to expect.

My fix: I started with the highest range and worked my way down until I got a good reading. It’s a bit slower than auto-ranging, but it’s a trade-off for the pocket size and simplicity.

Warranty & Support

UNI-T doesn’t prominently advertise a warranty length for the UT107+, so I’d recommend checking the documentation that comes in the box. The meter is CE certified, which suggests it meets European safety standards. If you run into an issue, your best bet is to contact UNI-T through their Amazon store page or check the user manual for contact info. For a meter at this price point, support is typically limited, so handle it with care.

My Final Verdict

The UNI-T UT107+ Digital Multimeter delivers exactly what it promises: a genuinely pocket-sized meter that fits in your palm at 7.2 x 3.46 x 2.2 inches and weighs just 0.2 kg. I’d recommend it to home DIYers and car hobbyists who need quick voltage checks up to 1000 volts and continuity tests without hauling a bulky meter around. I would not recommend it to electricians or anyone who needs to measure AC current.

The lack of AC current measurement is a real bummer, but for my weekend projects and fuse checks, the convenience of having a meter that disappears in my tool pouch makes it worth keeping. If your needs are basic and you value portability above all, this is a solid choice at a fair price.