# USB voltage meter GoodBuy GBUSBTEST 10mA 20V — inline USB power monitor for current and voltage

**URL:** https://aio.lv/en/product--goodbuy-gbusbtest--10751193
**Data updated:** 2025-12-30 10:03 (EET)
**Category:** USB Hubs
**Manufacturer:** GoodBuy
**Manufacturer code:** GBUSBTEST
**EAN:** 4752243045374
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

Compact USB voltage meter GoodBuy GBUSBTEST measures voltage up to 20V and current from 10mA increments inline with USB devices. Designed for testing and monitoring power delivery to phones, tablets and USB accessories, it provides real-time readings during charging or data transfer. Useful for troubleshooting cables, chargers and verifying device power consumption.

## Long description

GoodBuy GBUSBTEST is a compact inline USB power monitor that measures DC voltage from 4 V to 20 V and DC current from 0 A to 3 A with approximately 10 mA resolution. The device displays real-time readings on an LCD and records cumulative capacity up to 99,999 mAh and elapsed time up to 99 hours. It connects via USB 3.0-compatible ports and includes a RESET button to clear measurements. Its small dimensions (73 x 13.5 x 23 mm) make it convenient for inline testing of chargers, cables and USB accessories.
Advantages
The GoodBuy GBUSBTEST provides continuous, real-time monitoring of voltage and current during charging or data transfer without requiring disassembly of devices. Its wide voltage range (4–20 V) and current measurement up to 3 A cover common USB power scenarios. The built-in LCD, RESET button and compact size enable easy on-the-spot diagnostics of chargers, cables and peripherals, while capacity and time counters help track cumulative energy delivery.
Suitable for
Testing and monitoring phone and tablet charging
Verifying charger and cable performance
Troubleshooting USB-powered accessories
Measuring current draw of USB devices during operation
Key specifications
Voltage measurement: DC 4 V – 20 V
Current measurement: DC 0 A – 3 A
Measurement resolution / consumption: approx. 10 mA
Measurement frequency: 2 measurements / s
Capacity range: 0 – 99,999 mAh
Time range: 0 – 99 h
Display: LCD
Controls: RESET button
Compatible ports: USB 3.0
Dimensions: 73 x 13.5 x 23 mm
How to use
Connect the GoodBuy GBUSBTEST inline between a USB power source (charger or host) and the device under test using a USB 3.0-compatible port. The LCD will show real-time voltage and current readings; capacity and time counters accumulate automatically. Press the RESET button to clear measured counters when needed. Ensure connections are secure and observe measured values while charging or operating the connected USB device.
Usage recommendations
Use the meter within the specified ranges (4–20 V, 0–3 A). Avoid exposing the device to moisture or impact. For reliable readings, connect directly using compatible USB cables and avoid adapters that may affect voltage or current delivery.

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All GoodBuy products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized GoodBuy service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/10751193/59933838_large.webp