Introduction
Thank you for choosing the gdstime Adjustable AC/DC Power Adapter. This universal power supply is designed to provide a regulated DC output voltage from 3V to 12V (or 4V to 12V depending on plug type) with a maximum current of 2A, suitable for a wide range of electronic devices. Its compact design, high efficiency, and built-in safety features ensure reliable and safe operation. Please read this manual thoroughly before use to ensure proper setup and operation.
Safety Information
- Ensure the input voltage of the adapter (AC 100-240V) matches your local power supply.
- Do not expose the adapter to water, moisture, or extreme temperatures.
- Avoid dropping or subjecting the adapter to strong impacts.
- Do not attempt to open or modify the adapter. Refer all servicing to qualified personnel.
- Always verify the required voltage and current of your device before connecting it to the adapter. Setting an incorrect voltage can damage your device.
- Disconnect the adapter from the power outlet when not in use for extended periods.
- The adapter is equipped with multiple protection features including overcharge, over discharge, overvoltage, over current, short circuit, and temperature protection.

Product Overview
The gdstime Adjustable AC/DC Power Adapter is a versatile power solution featuring a voltage control knob for precise output adjustment. It comes in various plug types (US, EU, UK, EU Conversion) to suit different regional standards.


Key Features:
- Adjustable Voltage Output: Easily adjust the DC output voltage from 3V to 12V (US plug) or 4V to 12V (EU/UK plug) using the integrated knob.
- Universal AC Input: Supports AC 100-240V, 50/60Hz input, making it compatible with power outlets worldwide.
- High Efficiency: Designed for optimal power conversion with 95% efficiency.
- Compact and Durable: Made from PC+ABS engineering plastic for durability and portability.
- Comprehensive Safety Protections: Built-in safeguards against overvoltage, overcurrent, short circuit, overcharge, over discharge, and high temperature.
- Wide Application: Ideal for LED strip lights, wireless routers, CCTV cameras, monitors, LED modules, and various other DC-powered devices.

Specifications
| Feature | Specification |
|---|---|
| Item Name | Adjustable Power Adapter |
| Color | Mainly black |
| Efficiency | 95% |
| Net Weight | Approximately 140g |
| Material | PC+ABS Engineering Plastic |
| Input Voltage | AC 100-240V, 50/60Hz |
| Output Voltage (US Plug) | DC 3-12V, 100-2000mA (24W) adjustable |
| Output Voltage (EU/UK Plug) | DC 4-12V, 100-2000mA (24W) adjustable |
| DC Connector Size | 5.5*2.1mm |
| DC Plug Polarity | Center positive (+), outside negative (-) |
| Plug Type | Standard US / EU / UK (depending on variant) |
| DC Cable Length | Approx. 95cm / 3.12ft |
| AC Cable Length | Approx. 92cm / 3.02ft |
| Total Adapter Length | Approx. 196cm / 6.43ft |
| Adapter Dimensions (LxWxH) | Approx. 90mm x 50mm x 30mm |


Setup
- Identify Your Device's Power Requirements: Before connecting, check your device's specifications for its required DC voltage (V) and current (A). Ensure the voltage is within the adapter's adjustable range (3-12V or 4-12V) and the current draw does not exceed 2A.
- Check DC Connector Compatibility: Verify that your device uses a 5.5*2.1mm DC connector with center positive (+) polarity. Using an incompatible connector or incorrect polarity can damage your device.
- Select the Correct Plug Type: Ensure you have the appropriate AC plug type (US, EU, UK, or EU Conversion) for your region.
- Set Voltage to Minimum: Before connecting to your device, turn the voltage control knob to the 'Min' or 'Off' position.
- Connect to Device: Plug the DC output connector (5.5*2.1mm) into your electronic device's power input port.
- Connect to Power Outlet: Plug the AC input plug of the adapter into a compatible wall socket (AC 100-240V).
Operating Instructions
- Adjust Voltage: Slowly turn the voltage control knob clockwise from the 'Min' position. Observe your device or use a multimeter to set the output voltage to the exact requirement of your connected device. The dial indicates approximate voltage levels (e.g., 3V, 6V, 9V, 12V).
- Monitor Device Operation: Once the correct voltage is set, ensure your device operates normally. If you notice any unusual behavior (e.g., overheating, flickering), immediately disconnect the power adapter and re-check the voltage settings and device compatibility.
- Power Off: To turn off the power, rotate the voltage control knob counter-clockwise to the 'Off' or 'Min' position. For complete power disconnection, unplug the adapter from the wall outlet.

Maintenance
- Cleaning: Use a soft, dry cloth to clean the adapter. Do not use liquid cleaners or solvents.
- Storage: Store the adapter in a cool, dry place away from direct sunlight and moisture when not in use.
- Cable Care: Avoid bending or crimping the cables excessively. Do not place heavy objects on the cables.
Troubleshooting
No Power Output:
- Ensure the adapter is securely plugged into a working wall outlet.
- Check if the voltage control knob is turned to an 'On' position (not 'Off' or 'Min').
- Verify that the connected device is properly plugged into the adapter's DC output.
- Test the wall outlet with another device to confirm it has power.
Device Not Functioning Correctly:
- Double-check that the output voltage is set precisely to your device's requirement.
- Confirm that your device's current draw does not exceed the adapter's 2A maximum output.
- Verify the DC connector size (5.5*2.1mm) and polarity (center positive) match your device.
- If the adapter feels excessively hot, disconnect it immediately and allow it to cool. This could indicate an overload or short circuit.
User Tips
- For sensitive electronics, it is recommended to use a multimeter to precisely set the output voltage before connecting the device.
- Always disconnect the power adapter from the wall outlet before connecting or disconnecting devices to prevent accidental short circuits or voltage spikes.
- If using with LED strips, start with the lowest voltage and gradually increase until the desired brightness is achieved, ensuring not to exceed the LED strip's maximum voltage.
Warranty and Support
This product is manufactured under strict quality control standards. For any technical support or warranty inquiries, please contact the retailer or manufacturer directly. Keep your purchase receipt as proof of purchase.





