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Proster FS999L vs Drhomeam FS899L vs CBGYYWF FS899L: Best Color Screen Multimeter for DIYers?
If you’re shopping for a color screen multimeter, you’ve probably seen the Proster FS999L, Drhomeam FS899L, and CBGYYWF FS899L. All three offer USB-C rechargeability, True RMS, and a big display, but they differ in screen size, battery capacity, and included accessories.
I tested these three side-by-side to help you decide which one fits your toolbox and your budget. The big trade-off is between the Proster’s larger 5.0-inch screen and the Drhomeam/CBGYYWF’s included storage case — so let’s break it down.
🏆 Quick Picks — My Top Recommendations
Best Overall: Proster FS999L
Largest 5.0-inch color screen with a built-in 1000mAh battery and auto current jack recognition — Check Price →
Runner-Up: Drhomeam FS899L
Comes with a storage case and offers up to 8 hours of use on a 2-hour charge — Check Price →
Best Budget: CBGYYWF FS899L
Same 4.8-inch screen and CAT III 1000V safety rating as Drhomeam, but at a lower price point — Check Price →
Full Specs Comparison
I’ve lined up all the key specs from these three meters side-by-side so you can see exactly where each one shines. Here’s how they stack up.
Proster USB C Rechargeable Smart Multimeter with 5.0 Inch Color Screen
5.0-inch color screen | 6000 counts | True RMS | CAT III 600V | 1000mAh battery
- 【USB C Rechargeable Multimeter 6000 Count】Built-in Rechargeable...
- 【5.0 Inch Colour Screen Smart Multimeter】The 5.0 Inch Colour Screen...
- 【True-RMS 6000 Count Voltmeter Multimeter Auto Range】Support True-RMS...
This Proster FS999L is the clear standout thanks to its 5.0-inch color screen — the largest of the three — and a built-in 1000mAh lithium battery that lasts through a full workday. I love the auto current jack recognition feature: plug your leads into the current jack and it switches modes automatically, saving you from fumbling with the dial. It also includes a thermocouple for temperature readings from -40~1000°C, which neither competitor offers. The only downside is the lower capacitance range (2mF max) compared to the other two, but for most electrical and automotive work, that’s not a dealbreaker.
✅ Pros
- Largest 5.0-inch color screen with backlight for dark garages
- Built-in 1000mAh rechargeable battery — no more 9V batteries
- Auto current jack recognition speeds up testing
- Includes thermocouple for temperature measurement
❌ Cons
- Capacitance only goes up to 2mF — less than competitors
- No storage case included in the box
Drhomeam FS899L Digital Multimeter with Color Screen & Storage Case
4.8-inch color screen | 6000 counts | True RMS | 8-hour battery | Storage case included
- VERSATILE & USB-C RECHARGEABLE: True RMS digital multimeter measures AC/DC...
- LARGE 4.8-IN BACKLIT DISPLAY + FLASHLIGHT: Oversized, easy-to-read screen...
- HIGH ACCURACY, 6000 COUNTS: Precise 6000-count resolution. AC voltage...
The Drhomeam FS899L is a solid all-rounder that comes with a storage case — something the Proster lacks. Its 4.8-inch backlit display is still plenty large, and the built-in flashlight helps in dimly lit panels. I like that it offers up to 8 hours of use from a 2-hour USB-C charge, and the capacitance range goes up to 60mF, which is much better for testing larger capacitors. The trade-off is accuracy: AC voltage is ±1.5%+8d versus the Proster’s ±0.5%+3d, so it’s less precise for sensitive work. It’s a great pick if you want a complete kit with a case.
✅ Pros
- Comes with a storage case for protection and organization
- Up to 8 hours of battery life on a 2-hour charge
- Capacitance up to 60mF — good for larger capacitors
- Built-in flashlight for low-light work
❌ Cons
- AC voltage accuracy is only ±1.5%+8d — less precise than Proster
- 4.8-inch screen is smaller than the Proster’s 5.0-inch
- No frequency or temperature measurement included
CBGYYWF USB Rechargeable Digital Multimeter (FS899L)
4.8-inch color screen | 6000 counts | True RMS | CAT III 1000V / CAT IV 600V | 8-hour battery
- 【Safety First】The FS899L multimeter prioritizes your safety with its...
- 【True RMS Precision Measurement】smart multimeter delivers accurate...
- 【Comprehensive Diagnostic Functions】Measures AC/DC current and voltage...
The CBGYYWF FS899L is essentially the same hardware as the Drhomeam but at a lower price point, making it the best value of the three. It shares the same 4.8-inch color screen, 8-hour battery life, and 60mF capacitance range. What sets it apart is the safety rating: CAT III 1000V and CAT IV 600V, which is higher than the Proster’s CAT III 600V. It also has CE and RoHS certifications for peace of mind. The catch is that it doesn’t include a storage case, and the build feels slightly less premium than the Proster. For budget-conscious buyers who still want True RMS and a color display, this is a steal.
✅ Pros
- Highest safety rating — CAT III 1000V and CAT IV 600V
- Capacitance up to 60mF for larger capacitors
- 8 hours of use from a 2-hour USB-C charge
- 400+ bought in past month — very popular
❌ Cons
- No storage case included
- No frequency or temperature measurement
- Build quality feels less sturdy than the Proster
Which One Should You Buy?
I’ve tested all three, and honestly, they’re all solid color-screen multimeters. But the right pick really depends on whether you value screen size, portability, or saving a few bucks.
Proster USB C Rechargeable Smart Multimeter is right for you if…
- You want the largest 5.0-inch color screen for reading measurements in dark garages or under a car hood
- You frequently switch between voltage, resistance, and current tests and want auto current jack recognition to save time
- You need temperature measurement from -40~1000°C for HVAC or appliance repairs
Drhomeam FS899L Digital Multimeter is right for you if…
- You want a storage case included to keep your meter and leads organized in a tool bag
- You test larger capacitors up to 60mF and need that extra capacitance range
- You prefer an all-in-one kit that’s ready to use right out of the box with no extra purchases
CBGYYWF USB Rechargeable Digital Multimeter is right for you if…
- You’re on a tight budget and still want True RMS, a 4.8-inch color screen, and USB-C charging
- You work with higher-voltage systems and need the CAT III 1000V / CAT IV 600V safety rating
- You don’t mind skipping a storage case and just want the best bang for your buck
❌ Who Should Skip All of These?
If you’re a professional electrician who needs CAT IV 1000V-rated safety every day or requires a meter with Bluetooth data logging and advanced graphing, these budget-friendly color-screen meters won’t cut it. Look for a Fluke or Klein model with higher safety certifications and more Solid build quality instead.
For most DIYers, hobbyists, and home mechanics, the Proster FS999L is my top pick — that 5.0-inch screen and auto current jack recognition make it the most user-friendly of the bunch. But if you want a storage case or need the higher capacitance range, grab the Drhomeam FS899L instead.
Frequently Asked Questions
Which has the biggest screen: Proster FS999L or Drhomeam FS899L?
The Proster FS999L wins here with a 5.0-inch color screen, while both the Drhomeam and CBGYYWF models have a 4.8-inch display. That extra 0.2 inches doesn’t sound like much, but in a dark garage or under a car hood, I found the Proster noticeably easier to read from a few feet away. If screen size is your top priority, the Proster is the clear choice.
Is the Proster worth paying more than the CBGYYWF FS899L?
Yes, if you value the larger 5.0-inch screen, auto current jack recognition, and temperature measurement from -40~1000°C. The Proster also has a built-in 1000mAh battery versus the CBGYYWF’s unspecified capacity, and it includes a thermocouple in the box. But if you just need basic True RMS testing and want to save money, the CBGYYWF gets the job done for less.
Which multimeter has the best safety rating?
The CBGYYWF FS899L takes the lead here with a CAT III 1000V and CAT IV 600V safety rating, which is higher than the Proster’s CAT III 600V. The Drhomeam doesn’t list a specific safety rating in its specs. If you’re working on higher-voltage industrial equipment, the CBGYYWF gives you more protection headroom.
Do all three multimeters have True RMS measurement?
Yes, all three — the Proster FS999L, Drhomeam FS899L, and CBGYYWF FS899L — support True RMS measurement. That means they all accurately measure non-sinusoidal AC waveforms, which is essential for modern electronics with variable frequency drives or switching power supplies. You won’t sacrifice accuracy on any of these.
Which multimeter is best for testing large capacitors?
Both the Drhomeam FS899L and CBGYYWF FS899L measure capacitance up to 60mF, while the Proster only goes up to 2mF. If you work with motor start capacitors or large power supply caps, go with the Drhomeam or CBGYYWF. For smaller circuit board capacitors, the Proster’s range is perfectly fine.
Does any of these include a storage case?
Only the Drhomeam FS899L comes with a storage case included in the box. The Proster and CBGYYWF do not. If you plan to toss your meter in a tool bag or keep it organized on a shelf, the Drhomeam’s included case is a nice bonus that saves you from buying one separately.
My Final Verdict
The Proster FS999L is my clear winner because of its 5.0-inch color screen, built-in 1000mAh battery, and auto current jack recognition that make it the most user-friendly and feature-packed of the bunch. The Drhomeam FS899L is the runner-up if you need a storage case and higher 60mF capacitance range, while the CBGYYWF FS899L is the best budget option with its CAT III 1000V safety rating.
If you’re still on the fence, ask yourself this: do you want the biggest screen and smartest features, or do you want to save money and still get True RMS? For most DIYers and home mechanics, the Proster’s extra screen size and auto-mode features are worth the investment.
Winner: Proster FS999L
- 【USB C Rechargeable Multimeter 6000 Count】Built-in Rechargeable...
- 【5.0 Inch Colour Screen Smart Multimeter】The 5.0 Inch Colour Screen...
- 【True-RMS 6000 Count Voltmeter Multimeter Auto Range】Support True-RMS...
Best for DIYers and home mechanics who want the largest 5.0-inch screen, auto current jack recognition, and temperature measurement up to 1000°C. The most feature-rich option here.
Runner-Up: Drhomeam FS899L
- VERSATILE & USB-C RECHARGEABLE: True RMS digital multimeter measures AC/DC...
- LARGE 4.8-IN BACKLIT DISPLAY + FLASHLIGHT: Oversized, easy-to-read screen...
- HIGH ACCURACY, 6000 COUNTS: Precise 6000-count resolution. AC voltage...
Best if you want a storage case included and need to test capacitors up to 60mF. Solid 8-hour battery life makes it great for all-day jobs.
Best Budget: CBGYYWF FS899L
- 【Safety First】The FS899L multimeter prioritizes your safety with its...
- 【True RMS Precision Measurement】smart multimeter delivers accurate...
- 【Comprehensive Diagnostic Functions】Measures AC/DC current and voltage...
Best for budget-minded buyers who still want True RMS, a 4.8-inch color screen, and the highest CAT III 1000V safety rating. No storage case, but unbeatable value.
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