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DROK USB Tester, USB-A 2.0 Digital Multimeter Dual USB Output Ports PD QC 3.0 Color LED Display, 7 Modes Capacity Voltage Current Power Voltmeter Ammeter for Laptop Power Bank Solar Panel

4.6 4.6 out of 5 stars 3,864 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Multi Testers by DROK

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Black
USB-A

Purchase options and add-ons

Brand DROK
Power Source Battery Powered
Style Voltage Tester
Color Black
Item Weight 0.01 Ounces

About this item

  • 【7 Modes Display Monitor】 DROK USB Tester is equipped with digital color LED display screen, which can be switched between 7 display modes. This multimeter can be used to measure voltage, current, power, capacity. Through the 7 modes, you can clearly see the voltage, current, capacity and power during charging. Only 1 button to switch the display mode, simple and handy.
  • 【Dual USB Output】 This item is equipped with USB-A input and dual USB 2.0 output. The output ports support PD QC 3.0 fast charge protocol. This meter can auto identify the fast charge protocol, which can charge your device among 3.6V to 12V 3A. Output Ⅰ can be used for device charging and data transfer, and output Ⅱ can only be used for charging.
  • 【Multifunction】 DROK USB detector can be used for capacity checking, capacity clear, over voltage, under voltage, over current and short circuit alarm, which is easy to test the power, quality and know the health condition of your device chargers or USB cables.
  • 【Easy to Use】 The multimeter only has 1 button. Once you plug in the meter, you can test the parameter you want. The button can switch 7 modes display——VA(Voltage & Current), C(Capacity), P(Power), VA+C, VA+P, C+P, VA+C+P.
  • 【Application】 DROK USB Meter can be used for the devices between 3.2-30V and 0-5A. You can use this for 5V 9V 12V 24V 30V solar panel, power bank, battery charger, USB able.
Make it a bundle
We found 2 bundles with this item:
DROK USB Tester, USB-A 2.0 Digital Multimeter Dual USB Output Ports PD QC 3.0 Color LED Display, 7 Modes Capacity Voltage Current Power Voltmeter Ammeter for Laptop Power Bank Solar Panel

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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 3.5 x 3.1 x 1.2 inches; 0.01 ounces
  • Item model number ‏ : ‎ 300043
  • Date First Available ‏ : ‎ March 19, 2014
  • Manufacturer ‏ : ‎ DROK
  • ASIN ‏ : ‎ B00J3JSEG6
  • Customer Reviews:
    4.6 4.6 out of 5 stars 3,864 ratings

Product Description

Is your mobile device not charging properly, and you suspect the new charger that you bought recently? Do you want to check if your solar charger is giving proper current for your mobile device? Specification Input voltage : 3.20 - 15.0V Resolution: 0.01V [10V]; 0.1V [=10V] Measuring current: 0.00 -3.00A [10A Max, but cannot work in 10A for long time] Resolution: 0.01A Capacitance measurement: 0-99999 mA/H Capacitance accumulation: YES Power testing: 0.00-9.99-99.9W Over-voltage alarm: When voltage /=5.6V, voltage digital point will flash quickly Lacking-voltage alarm Over-current alarm : When current /=3A, current digital point will flash quickly Short-circuit alarm: current digital point will flash quickly Dual USB Output OUTPUT I [Dual Function - Device Charging and Data Transfer] The charging current, in this case, is determined by compatibility. You can view the voltage and current values at the same time. OUTPUT II [Device Charging Only] The Built-in intelligent charging control IC matches the most appropriate and safest current for your devices automatically. It is used mainly for Non-original Chargers, but it is suitable for Original Chargers as well. This universal usb gadget is suitable for most of the mobile phones, mobile power, tablet PCs and other USB devices, like BC1.2, YT/D1591-2009 and non-BC1.2. Get yours today by clicking “Add to Cart” above


From the brand


From the manufacturer

usb and volt meter
usb power meter
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Digital Multimeter USB usb load usb voltage converter usb step up
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Customer Reviews
4.6 out of 5 stars
196
4.3 out of 5 stars
14
4.3 out of 5 stars
302
4.3 out of 5 stars
50
Input Voltage DC 4-25.0V DC 4.0-25.0V DC 3.5-15V DC 3.5-15V
Operating Current 0.25-4.00A 0.03-5.00A
Max Discharging Power 25W 35W
Output Voltage - - DC 0.6-30V DC 0.6-30V
Display LED LCD LCD LCD

What's in the box

  • no
  • Product guides and documents

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    Customer reviews

    4.6 out of 5 stars
    4.6 out of 5
    3,864 global ratings

    Customers say

    Customers like the electric circuit testing device for its entertainment value. They say it's a fun little device to have in your tool box. They also appreciate the bright and readable LED display, which is easy to see in various lighting conditions. Customers like that the device is compact and easy to carry. They like that it works well for its intended purpose and is very useful to troubleshoot USB power banks. Customers are happy with readability, accuracy, and voltage display. However, some customers have different opinions on charging.

    AI-generated from the text of customer reviews

    1,359 customers mention1,285 positive74 negative

    Customers are satisfied with the quality of the electric circuit testing device. They mention that it works well for its intended purpose, and is extremely useful. Some say that it's a handy tool that works great for monitoring iPhone charger operation. Overall, most are happy with their purchase and recommend it to others.

    "...With few exceptions, excellent build quality (doesn’t “feel cheap”).ABOUT YHE COMPANY AND THEIR PRODUCT-..." Read more

    "...LED display (Red for Voltage, Blue for Current) on the DROK unit is beautiful and very easy to read...." Read more

    "For seeing what current draw small devices have, this works fine -- and will come in handy for that and the other functions it provides...." Read more

    "This is a very handy tool that I purchased to use in measuring the current and voltage of USB circuits and to evaluate whether or not the capability..." Read more

    375 customers mention297 positive78 negative

    Customers find the electric circuit testing device easy to use and understand. They appreciate the instruction sheet and screen. They also mention that the pigtail connectors make it easy to plug into weird areas and that the numbers are big and easy to read.

    "...The instructions coming with this product are excellent (see below for more on that in general)...." Read more

    "...of display and therefore greater functionality, plus it is supplied with instructions and comes packaged in a nice tin...." Read more

    "This device was very easy to use and settled a long running mystery of slow phone charging through our vehicle's built in USB charging port...." Read more

    "...The pigtail connectors make it very easy to plug into weird areas (like inside the center console of my car)...." Read more

    245 customers mention221 positive24 negative

    Customers are satisfied with the accuracy of the electric circuit testing device. They mention that it gives more accurate current readings, has more consistent readings and that the readings seem reasonable. Some say that the amperage reading seems to work well enough. Overall, most are happy with the product's accuracy and functionality.

    "...It gives more accurate current reading- It introduces less resistive drop..." Read more

    "...USB charging/discharge voltage, current; it will display alternately capacitance and power; or it only display power or only display capacitance..." Read more

    "...This one has way more consistent readings and it kind of matches my earlier observations about the performance of my different chargers and cables...." Read more

    "...The current and voltages measured by this thing are very accurate, easily within 1% of what I get ona DVM...." Read more

    141 customers mention132 positive9 negative

    Customers find the display of the electric circuit testing device bright and readable. They say the LED display is much easier to read than the LCD panel and is visible in various lighting conditions. The print is large and bright, making the readout easy to read. Customers also say the display is clear and plenty bright enough indoors.

    "...Its LED display is much easier to read than the LCD panel- It gives more accurate current reading-..." Read more

    "...Besides, the brightness is more than adequate and the numbers are big enough...." Read more

    "...The display is simple, but very easy to read...." Read more

    "...a DVM. The display is bright and easy to understand...." Read more

    76 customers mention67 positive9 negative

    Customers like the size of the electric circuit testing device. They mention that it's compact, has a large and readable display, and is portable. The measurements are all perfect, and it reads proper measurements. The numbers are large and easy to read, and the display is accurate from initial measurements.

    "...Features:1.This USB monitor is tiny in size and light in weight; it can display USB charging/discharge voltage, current; it will display..." Read more

    "...Besides, the brightness is more than adequate and the numbers are big enough...." Read more

    "...PROS• Display is very easy to read indoors.• Unit size makes it very portable.•..." Read more

    "...Speaking of which, the plug, wire and device are about 8 inches, so it's compact so it should fit in your bag of computer stuff...." Read more

    64 customers mention54 positive10 negative

    Customers like the voltage display of the electric circuit testing device. They say it displays reasonable values for voltage and current. Some say the LED display is much easier to read. That said, some say the basic display of volts and MA is simple. Overall, most are satisfied with the functionality and performance of the product.

    "...It can display both Voltage and Current at the same time- Its LED display is much easier to read than the LCD panel-..." Read more

    "...USB monitor is tiny in size and light in weight; it can display USB charging/discharge voltage, current; it will display alternately capacitance and..." Read more

    "...All of these meters are perfectly fine for straightforward voltage and current measurements and for someone who is familiar with the use of such..." Read more

    "...This little unit is perfect for checking both the amps and volts simultaneously delivered to two devices (plug in one device (port 1) and record the..." Read more

    46 customers mention46 positive0 negative

    Customers find the electric circuit testing device to be fun, satisfying, and enlightening. They say it's a fun little device to have in their tool box, especially if they're a geek. Customers also say it gives them piece of mind and is perfect for those moments when they are not sure if the device is not charging.

    "...This tester is not for everyone but it gives me piece of mind." Read more

    "...Very enlightening! Have learned that the power storage claims of all battery pack mfrs are total BS...." Read more

    "Works precisely as advertised. Appears as shown. Large clear numbers mean you can read it without glasses...." Read more

    "...your USB devices are consuming this is a good value and is just fun to tinker with. Would buy again/recommend." Read more

    173 customers mention120 positive53 negative

    Customers are mixed about the charging of the electric circuit testing device. Some mention that it has two USB output jacks so it can be used to test multiple devices at the same time, and one USB port will also transmit data. However, others say that the charging power rating does not seem appropriate, and the battery is not fully charged.

    "...2. It allows two USB devices to be plugged in at the same time, so it doubles as a port-extender...." Read more

    "...or it only display power or only display capacitance 2.USB multimeter allows you to easily and conveniently measure output current of USB mobile..." Read more

    "...Note: Does not power up with the new Pixel 3A USB-C charger -- but does with my other generic USB-C chargers...." Read more

    "...For that purpose, it is all fine and may help you diagnose some charging problems as well. Feels like accurate but I can not say it for sure...." Read more

    Duo input
    4 Stars
    Duo input
    I like the fact that this device will show me volts and amps in on either USB-C or standard USB.. what a lot of people don’t understand is watts can be confusing because voltage and amperage can differThe one issue I have with this device is it subMenus . They are little confusing and hard to understand the manual, it tells you a little but it’s still confusing.
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    Top reviews from the United States

    Reviewed in the United States on July 19, 2020
    Color: BlackSize: USB-AVerified Purchase
    24 people found this helpful
    Report
    Reviewed in the United States on September 13, 2014
    Color: BlackSize: USB-AVerified Purchase
    Customer image
    5.0 out of 5 stars My new favorite USB power monitor
    Reviewed in the United States on September 13, 2014
    With over a dozen USB-powered devices, power banks and AC adapters in the house, I need a USB power monitor to tell me which power source works well charging what devices. I have been using a similar product called [[ASIN:B00DF2485S PortaPow USB Power Monitor]] for the last few months. Recently I purchased this [[ASIN:B00J3JSEG6 DROK Dual-USB Output Charging Detector]] because it advertises several features I like:

    1. It has a dual-display to show both voltage and current simultaneously. For the PortaPow meter, I need to toggle a mechanical switch to select either voltage or current to display.

    2. It allows two USB devices to be plugged in at the same time, so it doubles as a port-extender. Note that the port on top can be used for both charging and USB communication, while the port below is for charging only.

    [LED display]
    The color LED display (Red for Voltage, Blue for Current) on the DROK unit is beautiful and very easy to read. In contrast, the LCD panel on PortaPow unit can be difficult to see under dim light. At first I was worried that the use of LED display will make it consume more power. But the actual standby current I measured is just around 10mA (the product description says '<20mA')

    [Accuracy]
    Both DROK and PortaPow units claim to have an accuracy of 1%. However, in my comparison against a DMM (digital multimeter), both units missed the goal. But at least the DROK unit is closer to target. For example:

    - When I insert the DROK unit in series with my DMM, the DMM reported 1.35A while the DROK reported 1.37A (0.02A too high)

    - When I insert the PortaPow unit in series with my DMM, the DMM reported 1.32A while the PortaPow reported 1.36A (0.04A too high)

    The result above also indicates that the PortaPow unit introduced more series resistance, hence the output voltage drops lower, resulting in slightly lower charging current.

    [Bottom Line]
    I consider the DROK USB meter to be a better product than the PortaPow unit, because:
    - It can display both Voltage and Current at the same time
    - Its LED display is much easier to read than the LCD panel
    - It gives more accurate current reading
    - It introduces less resistive drop

    The only negative I can say about this product: it comes with ZERO documentation. So you really have to read all the specs and operating instructions from the Amazon product page and user reviews.

    Currently the DROK unit is available at lower price than the PortaPow unit, so there's no doubt which product I recommend.

    [Update on Oct 18, 2014]
    I need to point out one limitation of this device: its top port is limited to USB 2.0 speed. I just tested this with my [[ASIN:B00LLER2CS SanDisk Ultra Fit USB 3.0 Flash Drive]]. This drive can deliver 145MB/s in Read speed when connected directly to an USB 3.0 port. When connected through the DROK monitor, however, its READ speed drops to just about 41MB/s.
    Images in this review
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    62 people found this helpful
    Report

    Top reviews from other countries

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    Dave
    5.0 out of 5 stars Nice little tool.
    Reviewed in Canada on November 1, 2021
    Color: BlackSize: USB-AVerified Purchase
    J-Tec
    5.0 out of 5 stars A very useful device
    Reviewed in Canada on December 28, 2021
    Color: BlackSize: USB-AVerified Purchase
    Cliente
    4.0 out of 5 stars Buen producto
    Reviewed in Mexico on April 30, 2019
    Color: BlackSize: USB-AVerified Purchase
    DTr
    4.0 out of 5 stars A decent usb tester
    Reviewed in Canada on November 9, 2016
    Color: BlackSize: USB-AVerified Purchase
    Customer image
    DTr
    4.0 out of 5 stars A decent usb tester
    Reviewed in Canada on November 9, 2016
    The USB meter came in a small box and that was it. There are no official instruction on how to properly use the tester. It was okay if you know what you are buying and doing. However lack of technical detail could be troublesome for some users.

    On the back of the devices, some limitation of the tester are listed (V3.2-30V, 0-3A).

    There are 2 outputs, the output 1 seems to allow more data communication between charger and devices. The output 2 didn't (but allow higher current, as they said). Haven't tested thoroughly for all cases yet.

    The tester seemed to work as it was designed to be. Showing proper voltages and current of various chargers and devices. So I recommended it to other.

    PRO:
    + extension cord for the tester, some have only usb head for the input without a short extension cord. This is troublesome for some small mulitple usb chargers as there is no space to plug in others.
    + Good built quality. The tester material is good, look good
    CON:
    - No instructions and limitation of each ports and how to use it properly.
    Images in this review
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    2 people found this helpful
    Report
    Thomas D.
    5.0 out of 5 stars Excellent USB Multimeter
    Reviewed in Canada on October 11, 2021
    Color: BlackSize: USB-AVerified Purchase