Introduction
This manual provides essential instructions for the safe and effective use of your Metasources 5V AC/DC Adapter. This adapter is specifically designed to power and charge PEAKME CK-W355 and CKW355 Pressure Monitors. Please read this manual thoroughly before use and retain it for future reference.

Image: The Metasources 5V AC/DC Adapter, a compact black power adapter with an integrated Micro-USB cable, designed for charging compatible electronic devices.
The Metasources 5V AC/DC Adapter is a reliable power supply featuring global voltage compatibility (100-240V AC) and multiple safety protections to ensure safe operation for your device.
Package Contents
- 1 x Metasources 5V AC/DC Adapter
Ensure all components are present and undamaged. If any items are missing or damaged, contact customer support.
Setup
- Identify the Adapter: Locate the Metasources 5V AC/DC Adapter. It features a standard US plug on one end and a Micro-USB connector on the cable end.
- Connect to Device: Insert the Micro-USB connector of the adapter cable into the charging port of your PEAKME CK-W355 or CKW355 Pressure Monitor. Ensure the connector is fully inserted and secure.
- Connect to Power Outlet: Plug the adapter's wall prongs into a standard AC power outlet (100-240V).
- Verify Connection: Your PEAKME Pressure Monitor should indicate that it is receiving power or charging, typically via an LED indicator on the device.

Image: The Metasources 5V AC/DC Adapter showing its main body and the attached cable with a Micro-USB connector. This adapter is designed for compatibility with devices requiring a 5V power input via Micro-USB.

Image: The Metasources 5V AC/DC Adapter with its cable neatly coiled, ready to be plugged into a wall outlet. This illustrates the compact design and the Micro-USB output connector.
Operating Instructions
The Metasources 5V AC/DC Adapter is designed for simple plug-and-play operation. Once connected, it will provide continuous power or charge your compatible device.
- Use the adapter only with compatible devices, specifically the PEAKME CK-W355 and CKW355 Pressure Monitors.
- Ensure the power outlet is easily accessible for quick disconnection if needed.
- Do not force the Micro-USB connector into the device's port. If it does not fit, verify compatibility and orientation.
Safety Information
Your Metasources adapter is built with multiple safety features to protect both the adapter and your connected device. Adhere to the following safety guidelines:
- Overcurrent Protection (OCP): Prevents damage from excessive current.
- Short-Circuit Protection (SCP): Automatically shuts off power in case of a short circuit.
- Overvoltage Protection (OVP): Safeguards against voltage surges.
- Overcharge Protection: Protects the device's battery from overcharging.
- Overpower Protection: Prevents the adapter from exceeding its power capacity.
- Over Temperature Protection: Monitors and regulates internal temperature to prevent overheating.
- Fire-Resistance: Constructed with fire-resistant materials.

Image: A visual representation of the 7-Point Safety Protection features integrated into the Metasources AC/DC adapter, including short circuit, overcurrent, overvoltage, overpower, over temperature, overcharge, and fire-resistance protections.
General Safety Precautions:
- Do not expose the adapter to water, moisture, or extreme temperatures.
- Do not disassemble or attempt to repair the adapter. Contact qualified personnel for service.
- Keep out of reach of children.
- Unplug the adapter from the power outlet when not in use for extended periods.
Maintenance
The Metasources 5V AC/DC Adapter requires minimal maintenance to ensure its longevity and performance.
- Cleaning: Disconnect the adapter from both the power outlet and your device before cleaning. Use a soft, dry cloth to wipe the exterior. Do not use liquid cleaners or solvents.
- Storage: Store the adapter in a cool, dry place away from direct sunlight and extreme temperatures. Avoid tightly coiling the cable to prevent damage.
- Cable Care: Regularly inspect the cable for any signs of fraying, cuts, or damage. If the cable is damaged, discontinue use immediately and replace the adapter. The adapter features a durable design with high-quality copper wire and PVC insulation for long service life.

Image: An illustration detailing the internal structure of the adapter, highlighting pure copper plates for efficient heat dissipation, and the robust construction of the cable with high-quality copper wire and a PVC insulation jacket for durability and long service life.
Troubleshooting
If you encounter issues with your Metasources 5V AC/DC Adapter, refer to the following common troubleshooting steps:
- Device Not Charging/Powering On:
- Ensure the adapter is securely plugged into both the wall outlet and the device.
- Try a different wall outlet to rule out a faulty power source.
- Verify that your device (PEAKME CK-W355/CKW355) is compatible with a 5V Micro-USB power supply.
- Check the adapter cable and connector for any visible damage.
- Adapter Feels Warm:
- It is normal for the adapter to feel slightly warm during operation. If it becomes excessively hot, unplug it immediately and contact customer support.
- Ensure the adapter is in a well-ventilated area and not covered.
If these steps do not resolve the issue, please contact Metasources customer support for further assistance.
Specifications
| Feature | Detail |
|---|---|
| Brand | Metasources |
| Model (Compatible Device) | PEAKME CK-W355, CKW355 Pressure Monitor |
| Input Voltage | 100-240V AC, 50/60Hz |
| Output Voltage | 5V DC |
| Wattage | 5 Watts |
| Connector Type | Micro-USB |
| Color | Black |
| Item Weight | 3 ounces |
| Safety Features | Overcurrent Protection (OCP), Short-Circuit Protection (SCP), Overvoltage Protection (OVP), Overcharge Protection, Overpower Protection, Over Temperature Protection, Fire-Resistance |
| Included Components | 1 AC Adapter |
Warranty and Support
Metasources stands behind the quality of its products. This adapter comes with the following warranty:
- Refund Policy: 30 Days Refund
- Exchange Warranty: 24 Months Exchange
For warranty claims, technical support, or any questions regarding your Metasources 5V AC/DC Adapter, please contact Metasources customer service. Refer to your purchase documentation for contact details or visit the official Metasources website.