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  • 30/07/2020

    That's a great meter. High accuracy. Fast delivery. Comfortable and precise.

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  • 17/05/2021

    Okay, thank you.

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  • 27/01/2020

    Delivery fast enough and took it only 26 days. They mailed Singapore and threw an envelope with a tester in the mailbox. The tester was sent in a thin mail plastic bag with no пупырчатой film inside, and it came in perfect condition. The tester itself was in an airtight transparent package. My FNB28 came with the firmware version v1.00, and now version v1.20 is available. When I run the utility, FNB28 DFU Tool v1.00 to update the firmware, when selecting the firmware file Fnb28v1.20.ufn pops up an error: "Unsupported exception in the application.". As a result, I found a solution, it is necessary to set it in the settings of Windows - "Control Panel" - "Language and Regional Standards" - "Format" - English (USA). I had Russian (Russia) and therefore the firmware update did not work. Submitted to Fnirsi's support team, but received no response. For that a big disadvantage to this producer. The tester itself works fine, charging protocols define well. For that price, I think this tester is one of the best.

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  • 25/02/2020

    The order was untraceable. Received in Nizhny Novgorod on the 18th day. Large enough functionality for such a cost. Made of quality. The screen is clear, bright. On the оргстекло top panel, it is best to immediately glue the protective film. An error appears when loading the firmware file in the application. The problem is solved by deleting the point in the firmware file name after the 1 in the firmware number.

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  • 29/05/2020

    A handy current and voltage meter with USB connectors, nice to measure consomption of small devices It is not very stiff so I may design a small 3D printed enclosure for it

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  • 17/02/2020

    small screen

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  • 19/03/2020

    Okay, but ooh. defective e-idling without consumer shows consumption around 800 mA instead of 0 mA-does not work. Too bad for high expectations!

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  • 17/03/2020

    Excellent build quality, many settings, on the off. The site has instructions in English.

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  • 09/10/2020

    I like to include a USB tester when I am supplying a project from a power bank, just to keep an eye on the power draw.I use several of these with my projects and find them very useful. This USB tester shows the key measurements of volts, amps, power and cumulative energy together with some other stats. It has 0.001V precision on the read-out, but that is a bit misleading because accuracy is +/- .4% to .8% + 3msb, or at 5V about +/- .43 mA for input current, +/- .22V for input voltage. Still, it is a neat unit an accurate enough for my needs. Recommended.

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  • 18/07/2020

    Need to test more but it seems it is doing what it should. Comes with no manual so again save the description from Banggood and use it as manual. Haven't got a chance to compare it with similar products. For the price it costs, I would definitely advise to give it a try. The display is very small and the 2 buttons quite hard to press.

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