DROK USB-A&USB-C/2pcs
DROK USB Tester User Manual
Model: USB-A&USB-C/2pcs
Brand: DROK
1. Introduction
This manual provides detailed instructions for the DROK USB Tester (USB-A & USB-C 2.0 Multimeter). This device is designed to measure and monitor various electrical parameters of USB power sources and connected devices, including voltage, current, power, and capacity. It features a color LED display and supports PD QC 3.0 fast charge protocols, making it a versatile tool for testing laptops, power banks, solar panels, and other USB-powered devices.

Figure 1: DROK USB Tester (USB-A & USB-C model)
2. Key Features
- 7 Modes Display Monitor: Equipped with a digital color LED display screen, switchable between 7 display modes to clearly show voltage, current, capacity, and power during charging.
- Dual USB Output: Features USB-A and USB-C input with dual USB 2.0 outputs. Supports PD QC 3.0 fast charge protocols.
- Multifunctionality: Capable of capacity checking, capacity clearing, and provides alarms for over-voltage, under-voltage, over-current, and short-circuit conditions.
- Easy to Use: Simple operation with two buttons for mode switching and output activation.
- Wide Application: Compatible with devices operating between 3.2-30V and 0-5A, suitable for solar panels, power banks, battery chargers, and USB cables.
3. Specifications
| Input Voltage Range | 3.20 - 15.0V |
| Voltage Resolution | 0.01V (<10V); 0.1V (≥10V) |
| Measuring Current Range | 0.00 - 3.00A (10A Max, not for prolonged 10A use) |
| Current Resolution | 0.01A |
| Capacitance Measurement | 0-99999 mAh |
| Power Testing | 0.00-9.99-99.9W |
| Over-voltage Alarm | Voltage digital point flashes quickly when voltage ≥5.6V |
| Over-current Alarm | Current digital point flashes quickly when current ≥3A |
| Short-circuit Alarm | Current digital point flashes quickly |
| Dimensions | 13.6 x 10 x 3.3 cm (Parcel); 69mm/2.71in (Tester body length), 190mm/7.48in (USB cable length) |
| Weight | 90 g |

Figure 2: Physical dimensions of the DROK USB Tester
4. Setup and Connection
The DROK USB Tester is designed for plug-and-play operation. Follow these steps to set up and connect the device:
- Identify Ports: The tester has a USB-A input, a USB-C input, and two output ports: OUTPUT I (USB-A) and OUTPUT II (USB-A).
- Connect Power Source: Plug the USB-A or USB-C input of the tester into your power source (e.g., wall charger, power bank, computer USB port). The display should light up.
- Connect Device: Plug the device you wish to test (e.g., smartphone, tablet, USB fan) into either OUTPUT I or OUTPUT II of the tester.
- Activate Output (if necessary): If using USB-C IN and USB-A OUT, or if the display shows no readings, long press Button I for 5 seconds to activate the output. This is typically required when voltage is ≥ 5V.
Understanding Dual USB Outputs:
- OUTPUT I (USB-A): Supports both device charging and data transfer. The charging current is determined by compatibility between the power source and the connected device.
- OUTPUT II (USB-A): Designed for device charging only. It features a built-in intelligent charging control IC that automatically matches the most appropriate and safest current for your devices. Suitable for both original and non-original chargers.
5. Operation
The DROK USB Tester features a simple two-button interface for controlling its functions and display modes.
Button Functions:
- Button I (Top Button):
- Long Press (5 seconds): Activates output when voltage is ≥ 5V (especially for USB-C IN and USB-A OUT configurations).
- Long Press (5 seconds) at the same time as Button II: Resets accumulated capacity data.
- Button II (Bottom Button):
- Short Press: Switches between the 7 display modes.
- Long Press (5 seconds) at the same time as Button I: Resets accumulated capacity data.

Figure 3: Button functions on the DROK USB Tester
Display Modes:
The tester cycles through 7 display modes with each short press of Button II:
- VA (Voltage & Current): Displays real-time voltage (V) and current (A).
- C (Capacity): Displays accumulated capacity (mAh).
- P (Power): Displays real-time power (W).
- VA+C: Displays Voltage, Current, and accumulated Capacity.
- VA+P: Displays Voltage, Current, and Power.
- C+P: Displays Capacity and Power.
- VA+C+P: Displays Voltage, Current, Capacity, and Power.
To reset the accumulated capacity (mAh) reading, simultaneously long press both Button I and Button II for 5 seconds.
6. Maintenance
To ensure the longevity and accurate performance of your DROK USB Tester, please follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the device. Do not use abrasive cleaners, solvents, or immerse the device in water.
- Storage: Store the tester in a cool, dry place away from direct sunlight, extreme temperatures, and high humidity.
- Handling: Avoid dropping the device or subjecting it to strong impacts, which can damage internal components or the display.
- Cable Care: Do not bend the integrated USB cables excessively or pull on them forcefully, as this can damage the internal wiring.
7. Troubleshooting
If you encounter issues with your DROK USB Tester, refer to the following common problems and solutions:
| Problem | Possible Cause / Solution |
|---|---|
| Display does not light up. |
|
| No current (A) reading, or 0.00A displayed. |
|
| Voltage (V) reading is unstable or incorrect. |
|
| Cannot reset accumulated capacity (mAh). |
|
| Display flashes quickly. |
|
8. Warranty Information
Specific warranty details for the DROK USB Tester may vary by region and retailer. Please refer to the warranty information provided at the time of purchase or contact your point of sale for details regarding warranty coverage and terms.
9. Customer Support
For further assistance, technical support, or inquiries regarding your DROK USB Tester, please contact DROK customer service through their official website or the retailer from whom you purchased the product. Please have your product model and purchase details ready when contacting support.
You can visit the official DROK store for more information: DROK Store on Amazon.ca
10. Official Product Videos
No official product videos from the seller were found for this specific model at the time of manual creation.
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