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Description
FNIRSI FNB48S USB Voltage Ammeter Multifunctional Fast Charge Tester, FNB48S Bluetooth1. Material: ABS 2. Monitoring voltage: 4~24V 3. Monitoring voltage resolution: 0. 00001V 4. Monitoring current: 0~6. 5A 5. Monitoring current resolution: 0. 00001A 6. Display power: 0~156W 7. Monitoring current resolution: 0. 00001W 8. Load equivalent international resistance: 0~9999. 9 ohms 9. Load equivalent international resistance resolution: 0. 0001 ohms 10. Capacity: 0~9999. 99Ah 11. Power consumption: 0~9999. 99Wh 12. Cable resistance: 0~9999.
1. Material: ABS
2. Monitoring voltage: 4~24V
3. Monitoring voltage resolution: 0.00001V
4. Monitoring current: 0~6.5A
5. Monitoring current resolution: 0.00001A
6. Display power: 0~156W
7. Monitoring current resolution: 0.00001W
8. Load equivalent international resistance: 0~9999.9 ohms
9. Load equivalent international resistance resolution: 0.0001 ohms
10. Capacity: 0~9999.99Ah
11. Power consumption: 0~9999.99Wh
12. Cable resistance: 0~9999.99 ohms
13. D+/D- voltage: 0~3.3V
14. D+/D- voltage resolution: 0.001V
15. Device temperature: Celsius/Fahrenheit
16. Dimensions: 34x13x75mm
17. Multifunctional protocol capacity testing tool, integrated USB-A, Micro-USB, type-C interface
18. Using external 16-bit ADC and PD protocol physical chip, real-time monitoring of voltage, current, power, capacity, charging protocol, curve waveform, etc.
19. 1.77-inch high-definition display
20. One key to switch between five or six digits display, the resolution can reach 0.00001, which can monitor the subtle changes of voltage, current and power during the charging process in real time
21. Using USB3.0 interface, 9-pin design, backward compatible with USB2.0, the transmission rate is + times of USB2.0
22. No need to use the original data cable, you can also directly test some charger protocol mobile phones
23. Small size, you can carry it anywhere you want to use it
24. It can record 10 sets of measurement data, and the battery capacity can be calculated according to the obtained data (plus the calculation formula, the result multiplied by 1000 is the battery capacity)
25. Support reading the data of E-Marker and DASH data line, after connecting the data line, you can easily read the chip of e-marker and DASH data line
26. Support the screen flip function, through the gravity sensor, the screen can be flipped freely, or you can turn off the gravity direction recognition, long press the middle button to flip the screen
27. Use the differential pressure method to measure cable resistance, and use it with constant current loads to facilitate detection of data line resistance
Specification:
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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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 9 reviews
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Product Reviews
★★★★★ 3
Unusable Adjustment Diagram – Completely Black
Color: Mesh Strap watch silver balck
The watch itself looks nice, but there is an issue with the instructions for adjusting the band. The included diagram is completely black and does not show how to make the adjustment.
I was only able to adjust the band because I had a diagram from a previous watch. Without that, it would have been very difficult.
The manufacturer should provide clear and readable instructions.
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Reviewed in the United States on April 30, 2026
★★★★★ 5
You won’t be disappointed with this one
Color: All Golden face Big Dial
Looks great fits great I was skeptical about getting it because I purchased another variation and was not happy at all but I like the way that this one looks so I said I’d give it another shot. I’m glad I did. I’m very impressed with it.
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Reviewed in the United States on May 28, 2026
★★★★★ 5
Stunning Automatic Watch With TopTier Durability and Precision
Color: Grey
“I got this Tissot PRX for my cousin’s birthday and bro fell in LOVE instantly.
This thing keeps time like a beast, never slows down, never lags. Automatic movement, so no batteries, no drama.
Durability? Stupid good. You can hit it, bump it, live life rough, it still looks box fresh.
Size wise it was almost perfect. I just had to remove two links, nothing big.
It’s light, functional, comfortable, doesn’t weigh you down, doesn’t get in the way but more importantly I can say this watch is in everyone’s eyesight when we wear it. Cause of course I had to get another one!
Basically. I gave him a very nice piece as a gift, and now he’s walking around like he owns Switzerland.
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Reviewed in the United States on December 11, 2025
★★★★★ 5
Great watch!!!!
Color: Grey
Excellent quality, one of the best, elegant.
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Reviewed in the United States on May 6, 2026
★★★★★ 5
Excellent value for an automatic watch, keeps VERY good time.
Color: Grey, Color: Grey
I've only had the watch for a day but wanted to leave a quick review on it to share a couple of notes.
So far it keeps VERY good time, better than any of the automatics I own (including a Rolex Submariner, Tag Heuer Aquaracer, Tag Heuer Formula One, and several other sub $1k watches). I set it to an atomic time app on my phone yesterday and 24 hours later it's still SPOT on - hasn't gained/lost even a 1/10 of a second. I was shocked to see it's kept PERFECT time for the last day, I'm really blown away so far. I've worn it the entire time, we'll see how well it keeps time while being stored in a winder.
This picture shown is the watch with a 22mm leather band on it, fit's without any issues (just need to squeeze in the leather a tad). I doubt it would work with a 22mm metal bracelet, but leather works great. Just FYI since the 21mm lug width is kind of odd.
The face isn't quite a lustrious as the images make it look, but it's still a great-looking watch. For a sub $1000 automatic you can't go wrong, this is a fantastic watch at a great price. It'll be my daily driver for some time I'm sure. If I have any issues in the future I'll update the review.
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Reviewed in the United States on March 22, 2021
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