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⚡ Power up your precision — never miss a beat in your DIY or professional projects!
The AstroAI TRMS 4000 Counts Digital Multimeter combines professional-grade accuracy with user-friendly features like auto-ranging, non-contact voltage detection, and a smart battery tester with LED alerts. Designed for safety and durability, it includes double ceramic fuses and a silicon protective case, making it an essential tool for millennial managers and DIY enthusiasts who demand reliability and efficiency in their tech toolkit.










| ASIN | B08DHHJPS1 |
| Best Sellers Rank | 10,454 in DIY & Tools ( See Top 100 in DIY & Tools ) 12 in Multi Testers |
| Brand | AstroAI |
| Colour | Green,Red |
| Country Of Origin | China |
| Customer Reviews | 4.7 out of 5 stars 6,340 Reviews |
| Item Dimensions | 14.9 x 7.1 x 3.5 centimetres |
| Item Weight | 219 Grams |
| Item dimensions L x W x H | 14.9 x 7.1 x 3.5 centimetres |
| Item weight | 219 Grams |
| Manufacturer | AstroAI |
| Manufacturer Part Number | M4K0R |
| Maximum Operating Voltage | 600 Volts |
| Measurement Type | Multimeter |
| Model Number | ASIM4K0R |
| Power Source | Battery Powered |
| Power source | Battery Powered |
| Style | Safety |
| Style Name | Safety |
| UPC | 810074980166 |
| Upper Temperature Rating | 40 Degrees Celsius |
M**S
all the features you need,
spot on, for automotive use it is great, battery voltage test with colour led, ohms test being auto ranging is perfect, very easy to use,
B**Y
Paid for itself on saved batteries
This is great for home use if you use a lot of batteries. I bought it primarily for the battery testing facilities as we were having problems with some items [grandkids toys and other "smart home" items. We were changing battery sets frequently so thought I'd get a meter to check the status of each individual battery rather than block change them out. I chose this model from the reviews, the price, and the simple switch for choosing the test function needed. I have only used it for resistance and battery checking to date but it paid for itself within a short time as a relation has a holiday let and routinely has to check batteries for the fire regs. Using the meter allowed faulty cells to be replaced individually, saving money each time. I bought a second one as a gift and left it at the holiday let. Very simple to use and a nice clear display. The associated user manual is small but pretty comprehensive with some real life usage examples. My grandson likes to help with the testing [a clear red or green light depending on the voltage of the battery being tested]. One word of caution - the test leads have a very sharp prong at the end so be careful.
K**R
Handy multimeter
Bought as a present for my son who had little experience of using a multimeter. He has found it easy to use and so far accurate. It's the right size for holding in the hand and has a clear readout. So far the quality seems good.
D**C
Recommended👍
This is just amazingly good 😊 It's easy to use, measuring well and the functions are excellent plus the display light and additional torch feature is superb, as is the mains voltage detection that's so useful finding hidden cables in walls and tracing live circuits. Amazon is great because one can search for something from actual product reviews. I needed a new meter after my old one broke, and was thinking about buying an expensive type as surely a 'cheap' meter would be a waste of money!?? Reading the reviews of people who had bought the expensive ones though and been very disappointed, I decided to go low and check the reviews on the cheaper types which included this. Having read other opinions I decided to buy this one and am so pleased that I did. I'm about to order another one for help in my work fixing vintage gaming and arcade equipment, but just wanted to add to this review, praise for the meter and suggest also if you have any requirements for a meter, then buy and try this! I can certainly thoroughly recommend it 👍 It may be a cheap meter but works incredibly well and didn't cost a fortune. A++++ to the manufacturer! A worthy addition to anyone's toolkit ✔️
C**S
Good Value
Great product, well made and works exactly as it should. Even comes with a spare set of batteries!
M**N
Very good.
Good multimeter. Decent quality, works as it should and I particularly like the 12v battery test feature. Highly recommended.
G**H
Excellent value for money
Great multimeter for the price. Does everything you'd expect with AC/DC voltage, Ohms and current. Continuity tester is very handy for buzzing out wiring looms and connectors. Capacitance is a surprising addition for a meter of this price. Not sure how accurate it is but very helpful when checking electrolytics and ceramics for degradation. The probes are fully insulated down to the tips to avoid any shorts when poking into tight spaces or across small pins. The safe/unsafe voltage sensor works but I'm not sure I'd trust it with avoiding getting electrocuted! The torch and light up display are life changing when poking around in engine bays or dark wiring cabinets! The more advanced features are really handy if you need them. If you just want a simple test meter, the auto range setting is ideal removing the need to fiddle with the dial and pick settings if you're not sure what you need. Well worth the money.
P**S
Versatile and easy to use
I found it easy to use this multimeter straightaway. The two AAA batteries were already loaded during packaging up for sale. The instructions are simple and clear. I mainly use a multimeter on low voltage applications rather than above mains voltage or high current. The meter can detect live cables in walls so it should be useful in DIY around the home.
R**N
Güzel
Beğendim, internetten kullanılınışını öğreniyorum niye Türkçe kullanım klavuzu yazmazlar anlamak mümkün değil
M**Y
Opinia
Polecam
Y**Y
Solid product
Solid product
P**A
Muy buena calidad.
Lo recomiendo, es de muy buena calidad.
A**M
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Trustpilot
2 months ago
1 month ago