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USB Tester DC digital Voltmeter Ammeter

9 reviews
100% of buyers enjoyed this product! 1675 orders
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Technical parameters:
Voltage measuring range: 3.60V ~ 32.5 V Resolution precision: 0.01 V
Current measuring range: 0.00A ~ 5.00 A Resolution precision: 0.01 A
Power cumulative range: 0 ~ 999999 WH Resolution precision: 0.001 Wh
Capacity range : 0 ~ 999999 mAH Resolution precision: 0.001 Ah
Temperature:0 ℃ ~ + 80 ℃ Resolution precision:1 ℃
D+ Voltage : 0.000V ~ 2.999 V Resolution precision: 0.001 V
D- Voltage : 0.000V ~ 2.999 V Resolution precision: 0.001 V
Load impedance: 0 ~ 999 ohm Resolution precision: 1 ohm
Power metering range: 0 ~ 299.999 W Resolution precision: 0.001 W
Timing maximum time: 999 H 59 M 59 S Resolution precision: 1 S
Time to refresh: > 500 ms/time > 500 ms/times
Measurement rate: 0.5 times/s
Use large equipment of the same metal manganese bronze sampling resistor
(1.0 mm diameter metal manganese bronze material < 0.05R)
Product size: 65 x 24 x 14 mm
Since the power flow: < 0.003 A ( < 3mA )
Working temperature: – 10 ~ + 60 ℃
Working humidity: 10 ~ 80 (no doubt)
The pressure of work: 80 ~ 106 kpa

Cumulative capacity range: 0-99999 mah precision: 0.001 Ah (New features or D+ D- Voltage )

Item size:65 * 24 * 14 mm
Net weight: 19g
Package weight: 28g
Color: Black
Display Color: white or black

Packing content:
1 x Digital USB Voltmeter Tester

Function characteristics:

1) 8192 pixels HD display;

2) D+ D- Voltage Tester

3) Memory power time data such as power;

4) The single monitoring shows charging voltage, current, power, power WH,mAH, charging time and other information;

5) USB is the copper pin and a low resistance in sampling technology, access after almost does not affect the charging speed;

6) Wide voltage from 3.60 V to 32.5 V;

7) Low and lower power since the < 0.003 A ( < 3mA )

3.60V~32.5V / 0.00A~5.10A / 0 ~ 299.999W / 0 ~ 999999 WH / 0 ~ 999999 mAH / 0℃~+80℃ / 0~999 ohm / 999H 59M 59S / D+ D- Voltage 0.000V ~ 2.999 V / Since the power flow: < 0.003 A
8.When the power is > 0.5W, the time will be calculated!

Important Tips:
1)Backlit the default value is 10 seconds automatically shut down, if you need to close a backlight or normally open backlighting, please in double-click backlit screen button or click the button to adjust, thank you!

2)When the ambient temperature changes or the outside heat conduction to tester causes the current to not return to zero and the display shows 0.01A or 0.02A or otherwise,Please Hold on the key buttion then insert to USB Charger It can make the current temperature of the ambient current zero calibration,After the zero can more accurate measurements.And when in Zero calibration,the output can not have any load current consumption, so usb tester display 0.00A


We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.

How do you ship packages?

Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

Do you ship worldwide?

Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.

What about customs?

We are not responsible for any custom fees once the items have shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.

How long does shipping take?

Shipping time varies by location. These are our estimates:
Location *Estimated Shipping Time
United States 10-30 Business days
Canada, Europe 10-30 Business days
Australia, New Zealand 10-30 Business days
Central & South America 15-30 Business days
Asia 10-20 Business days
Africa 15-45 Business days
*This doesn’t include our 2-5 day processing time.

Do you provide tracking information?

Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.

My tracking says “no information available at the moment”.

For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.

Will my items be sent in one package?

For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.

If you have any other questions, please contact us and we will do our best to help you out.


Order cancellation

All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.


Your satisfaction is our #1 priority. Therefore, if you’d like a refund you can request one no matter the reason.

If you did not receive the product within the guaranteed time( 45 days not including 2-5 day processing) you can request a refund or a reshipment.
If you received the wrong item you can request a refund or a reshipment.
If you do not want the product you’ve received you may request a refund but you must return the item at your expense and the item must be unused.

  • Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
  • Your order did not arrive due to exceptional circumstances outside the control of (i.e. not cleared by customs, delayed by a natural disaster).
  • Other exceptional circumstances outside the control of

*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page

If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.


If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.

Please do not send your purchase back to us unless we authorise you to do so.

Real customer reviews

9 reviews
100% of buyers enjoyed this product!
5 stars
4 stars
3 stars
2 stars
1 star
verifed buyer
8 Mar 2019

Short test, seems to be functional.

verifed buyer
16 Feb 2019

Hi goods excellent check отпишусь come very long

verifed buyer
29 Jan 2019

Delivery in 20 days to France. Delivered in English.

verifed buyer
10 Jan 2019

Delivery at Montreal (Canada) took a bit more one month. Seller has chosen AliExpress Standard Shipping - was showed each step on the way of delivery. Device is completely correspond to description and it is working properly. About accuracy a bit difficult to talk, but its is helpful to have at home for compare chargers and USB-cables . Back-light is adjusting. About reliability will talk later - so far so good. Thanks for store and for everybody who leave a feedback about product.

verifed buyer
31 Dec 2018

the tester is perfect and calibrated! the shipping is fast and quality! thanks

verifed buyer
24 Oct 2018

Fast shipping and delivery. Nice product with good quality. This USB tester and meter is great. Tests OK. Perfect ! Good store ! Thank you :)

verifed buyer
4 Oct 2018

It came fast, it works very well, the store sent it fast, i highly recommend it.

verifed buyer
3 Oct 2018

Arrived in one and a half months to Canada. Packaging was pretty ordinary, and the tester worked flawlessly! I'm very happy with the purchase.

verifed buyer
19 Sep 2018

Seems to work as described. Backlight timeout can be set by choosing the "BL" screen, double clicking and then click again and hold. If you turn the backlight off you will need a flashlight. Viewing angle isn't very good.

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