QOFOWIN H222 USB Bluetooth 5.3 Audio Receiver Instruction Manual

1. Introduction

The QOFOWIN H222 USB Bluetooth 5.3 Audio Receiver is designed to add wireless audio streaming capabilities to various sound systems. This compact adapter allows you to connect your Bluetooth-enabled devices, such as smartphones or tablets, to car stereos, home stereo systems, or portable speakers that have a USB or 3.5mm Aux input. It utilizes Bluetooth 5.3 technology for stable connections and high-quality audio transmission.

Image 1.1: The QOFOWIN H222 USB Bluetooth 5.3 Audio Receiver. This image shows the compact, black USB dongle with a blue Bluetooth logo and a USB-A connector.

2. Safety Information

• Always use a 5V power supply for the device.
• Maintain a distance of no more than 10 meters (33 feet) between the Bluetooth receiver and the connected audio device for optimal performance and safety.
• Do not expose the device to extreme temperatures, moisture, or direct sunlight.
• Avoid disassembling or modifying the device, as this may void the warranty and pose safety risks.

3. Key Features

• Bluetooth 5.3 + EDR: Ensures stable connection and high-quality audio transmission.
• Wide Compatibility: Supports A2DP, AVRCP, AVDTP, HFP, and HSP profiles.
• Dual Input Modes: Operates via USB input (for compatible systems) or 3.5mm AUX input (requires external USB power).
• Plug and Play: No application download required for operation.
• Portable Design: Small and lightweight for easy transport and use in various environments.
• Transmission Range: Up to 10 meters (33 feet) for wireless connectivity.

4. Setup Instructions

4.1. USB Input Mode (Plug and Play)

This mode is suitable for audio systems (such as older speakers or car stereos) that have a functional USB input port capable of both powering the device and receiving audio data. Note that some car systems may not support USB Bluetooth input directly and might require the AUX input mode.

1. Insert the QOFOWIN H222 USB Bluetooth Receiver directly into an available USB port on your audio system.
2. Ensure your audio system is powered on and set to the USB input source, if applicable.
3. The device will power on and enter pairing mode automatically.

Image 4.1: Setup using USB input mode. The image shows the H222 receiver plugged into a speaker's USB port, with a smartphone ready for Bluetooth pairing.

4.2. AUX Input Mode (Requires External USB Power)

This mode is used when your audio system has a 3.5mm AUX input but no compatible USB audio input, or if the USB port is only for charging. An external USB power source is required for the receiver.

1. Connect the QOFOWIN H222 USB Bluetooth Receiver to a 5V USB power source (e.g., a USB wall adapter, car charger, or a USB port that provides power only).
2. Connect one end of the provided 3.5mm audio cable to the AUX output port on the Bluetooth receiver.
3. Connect the other end of the 3.5mm audio cable to the 3.5mm AUX input port on your audio system (e.g., car stereo, home speaker).
4. Ensure your audio system is powered on and set to the AUX input source.
5. The device will power on and enter pairing mode automatically.

Image 4.2: Setup using AUX input mode. The image illustrates the H222 receiver connected to a USB power supply and then via a 3.5mm cable to a speaker's AUX input, with a smartphone ready for Bluetooth pairing.

Image 4.3: Example of car console with USB and AUX input ports. This image helps identify where to connect the receiver in a vehicle.

5. Operating Instructions

5.1. Bluetooth Pairing

Once the QOFOWIN H222 receiver is powered on (via USB or AUX mode), it will automatically enter pairing mode, indicated by a flashing LED light (if present). Follow these steps to connect your audio device:

1. On your smartphone or other Bluetooth-enabled device, navigate to the Settings menu.
2. Select Bluetooth to open the Bluetooth settings.
3. Ensure Bluetooth is enabled on your device.
4. Scan for available devices. You should see "H222" appear in the list of devices.
5. Select "H222" to initiate the pairing process. No password is required.
6. Once connected, the LED indicator on the receiver will typically show a solid light, and your device will confirm the connection.
7. You can now play music or audio from your device through the connected sound system.

Image 5.1: Visual guide for Bluetooth pairing on a smartphone. The image displays a sequence of screenshots showing how to access Bluetooth settings, find "H222", and connect.

5.2. Working Range

The QOFOWIN H222 receiver has a maximum transmission distance of 10 meters (33 feet). For optimal audio quality and connection stability, ensure your paired device remains within this range and avoid significant obstructions between the receiver and your device.

Image 5.2: Diagram illustrating the 10-meter (33 feet) working range of the Bluetooth receiver within a typical indoor environment, showing a user and a speaker system.

6. Product Specifications

Image 6.1: Diagram showing the dimensions of the QOFOWIN H222 receiver, indicating its length, width, and thickness in millimeters.

7. Troubleshooting

• Device not powering on:
  • Ensure the USB power source is active and providing 5V.
  • If using AUX mode, confirm the USB power connection is secure.
  • Try a different USB port or power adapter.
• Cannot find "H222" in Bluetooth list:
  • Make sure the receiver is powered on and within 10 meters of your device.
  • Disable and re-enable Bluetooth on your audio source device (smartphone, tablet).
  • Restart the QOFOWIN H222 receiver by unplugging and re-plugging it.
• No audio or low volume:
  • Verify that your audio system is set to the correct input source (USB or AUX).
  • Check the volume levels on both your audio source device and the connected sound system.
  • Ensure the 3.5mm audio cable (if used) is securely connected at both ends.
  • Some car systems may not support USB audio input; try AUX mode if available.
• Audio cutting in and out / Unstable connection:
  • Reduce the distance between your audio source device and the H222 receiver.
  • Remove any obstacles that might be interfering with the Bluetooth signal.
  • Ensure there are no other strong wireless signals (e.g., Wi-Fi routers, other Bluetooth devices) nearby that could cause interference.
  • If using a USB port for power, ensure it provides sufficient and stable power. Try a dedicated USB power adapter if issues persist.