Kircuit FM-B2403
Product Instruction Manual
Kircuit USB-C 5V AC/DC Adapter
Introduction
This manual provides essential information for the safe and effective use of your Kircuit USB-C 5V AC/DC Adapter. Please read this manual thoroughly before use and retain it for future reference.

Image: Kircuit USB-C 5V AC/DC Adapter (wall plug) and a coiled USB-C to USB-A cable.
Product Overview
The Kircuit USB-C 5V AC/DC Adapter is designed to provide reliable power to compatible devices, specifically Belifu Model FM-B2403 series electric pulse massagers and similar devices requiring 5V DC power via a USB-C connection. It converts standard AC wall power to the necessary DC power for operation or battery charging.
Key Features:
- Universal Input Voltage: Supports 100-240VAC, 50/60Hz for worldwide compatibility.
- Safety Protections: Equipped with Over Voltage Protection (OVP), Over Current Protection (OCP), and Short Circuit Protection (SCP) to ensure safe operation.
- USB-C Output: Provides 5V DC power through a USB-C connector.
- Compatibility: Specifically designed for Belifu Model FM-B2403, FMB2403, FM-82403, FM82403 3.7V 300mAh 0.3Ah battery machines and electric pulse massagers.
Setup
- Verify Compatibility: Ensure your device requires a 5V DC input and uses a USB-C charging port. This adapter is compatible with Belifu Model FM-B2403, FMB2403, FM-82403, FM82403 3.7V 300mAh 0.3Ah battery machines and electric pulse massagers.
- Connect the Cable: Insert the USB-A end of the provided USB-C cable into the USB-A port on the Kircuit AC/DC adapter.
- Connect to Device: Insert the USB-C end of the cable into the charging port of your compatible device.
- Plug into Power Outlet: Insert the AC/DC adapter into a standard electrical wall outlet (100-240VAC, 50/60Hz).
Important Note: This adapter is designed for specific devices. Using it with incompatible devices may cause damage to the adapter or the device.
Operating Instructions
Once properly connected, the adapter will begin supplying power to your device or charging its battery. The operation of your device (e.g., electric pulse massager) is independent of the adapter and should follow the instructions provided with your specific device.
Charging Batteries:
When charging a device with a rechargeable battery, observe the device's charging indicator (if available) to determine charging status. Disconnect the adapter once the device is fully charged or when not in use.
Battery Life Consideration: Rechargeable batteries have a finite lifespan, typically 1 to 3 years. An old or dead battery may not accept a charge, which is not an indication of a faulty charger. If you suspect battery issues, a voltmeter can be used to test charger functionality.
Maintenance
- Cleaning: Disconnect the adapter from the power outlet and the device before cleaning. Use a dry, soft cloth to wipe the surface. Do not use liquid cleaners or abrasive materials.
- Storage: Store the adapter in a cool, dry place away from direct sunlight and extreme temperatures when not in use.
- Cable Care: Avoid bending or crimping the cable excessively. Do not pull the cable to disconnect the adapter from the outlet; always grasp the adapter body.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device not powering on or charging. |
|
|
| Adapter feels warm during use. | Normal operation. | A slight warmth is normal. If it becomes excessively hot or emits smoke/smell, disconnect immediately and discontinue use. |
Specifications
| Feature | Detail |
|---|---|
| Brand | Kircuit |
| Model Compatibility | Belifu Model FM-B2403, FMB2403, FM-82403, FM82403 (3.7V 300mAh 0.3Ah Battery Machine Electric Pulse Massager) |
| Input Voltage | 100-240VAC, 50/60Hz |
| Output Voltage | 5V DC |
| Connector Type | USB-C |
| Color | Black |
| Special Features | OVP, OCP, SCP Protection |
| Manufacturer | Shenzhen Waweis Technology Co., Ltd |
Safety Information
- Do not expose the adapter to water, moisture, or extreme temperatures.
- Do not disassemble or attempt to repair the adapter. Refer to qualified personnel for service.
- Avoid dropping or subjecting the adapter to severe impact.
- Keep out of reach of children.
- Ensure proper ventilation around the adapter during use.
- Disconnect from power outlet when not in use for extended periods.
Warranty and Support
This Kircuit product is designed for reliability and performance. For any issues or inquiries, please refer to the seller or manufacturer for support.
Return Policy: This product is typically eligible for returns within 30 days of receipt. Please check the specific return policy of your retailer for details.
Manufacturer: Shenzhen Waweis Technology Co., Ltd
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