DISOUR Upgrade C28 Bluetooth 5.3 Transmitter Receiver User Manual

1. Introduction

The DISOUR Upgrade C28 is a versatile 2-in-1 Bluetooth 5.3 adapter designed to enhance your audio experience. It functions as both a Bluetooth transmitter (TX) and a receiver (RX), allowing you to wirelessly stream audio to and from various devices. With its compact design, 4-hour battery life, and lossless sound quality, it's ideal for car audio, home entertainment systems, and personal listening.

Image: The DISOUR Upgrade C28 device, highlighting its 2-in-1 receive and transmit capabilities and Bluetooth 5.3.

2. Safety Information

Please read and follow these safety guidelines to ensure safe operation of your device:

• Keep the device away from water, moisture, and extreme temperatures.
• Do not attempt to disassemble, repair, or modify the device.
• Use only the provided charging cable and a compatible power source (5V/1A).
• Avoid dropping or subjecting the device to strong impacts.
• Keep out of reach of children.

3. Package Contents

Verify that all items are present in your package:

• 1 x DISOUR Upgrade C28 Bluetooth 5.3 Adapter
• 1 x 3.5mm Audio Plug
• 1 x USB Charging Cable
• 1 x User Manual (this document)

4. Specifications

Image: Diagram showing the dimensions of the C28 adapter (59.5mm length, 22mm width, 12mm height).

5. Setup and Operation

The C28 adapter features a single multi-function button for power/play/pause and a switch for selecting Transmitter (TX) or Receiver (RX) mode.

Image: Side view of the C28 adapter, illustrating the 3.5mm jack and control button.

5.1 Initial Setup and Charging

1. Before first use, fully charge the device using the provided USB charging cable. Connect the cable to the 5V/1A charging port on the adapter and a suitable USB power source. The indicator light will show charging status.
2. A full charge takes approximately 1 hour and provides about 4 hours of use.

Image: Illustration of the C28's 4-hour battery life and the ability to use it while charging.

5.2 Receiver Mode (RX)

In RX mode, the C28 receives Bluetooth signals from your phone or other devices and transmits them to wired audio equipment (e.g., car stereo, home speakers, wired headphones).

1. Ensure the device is charged.
2. Connect the C28 to your audio device's AUX input using the 3.5mm audio plug.
3. Slide the switch button to the RX position.
4. Turn on the C28 by long-pressing the multi-function button. The blue indicator light will flash quickly, indicating it's ready for pairing.
5. On your phone or other Bluetooth-enabled device, search for "C28" in the Bluetooth settings and select it to pair.
6. Once paired, the blue light will remain steady, and audio from your phone will play through the connected wired device.

Image: Diagram showing the C28 in RX mode, receiving a wireless signal from a cell phone and outputting to a power amplifier and ordinary speakers.

Image: The C28 adapter installed in a car's AUX interface, enabling wireless audio and hands-free calls.

5.3 Transmitter Mode (TX)

In TX mode, the C28 converts wired audio signals from devices like TVs or PCs into Bluetooth signals, transmitting them to wireless headphones or speakers.

1. Ensure the device is charged.
2. Connect the C28 to your audio source's 3.5mm audio output (e.g., TV, PC, notebook) using the 3.5mm audio plug.
3. Slide the switch button to the TX position.
4. Turn on the C28 by long-pressing the multi-function button. The red indicator light will flash quickly, indicating it's ready for pairing.
5. Place your wireless headphones or speaker into pairing mode.
6. The C28 will automatically connect to the nearest available Bluetooth receiving device. Once connected, the red light will remain steady.

Image: Diagram showing the C28 in TX mode, converting wired audio from a PC, TV, or notebook into a wireless signal for a wireless speaker or earphone.

Image: The C28 adapter connected to a TV's 3.5mm audio interface, allowing audio to be transmitted wirelessly to headphones.

Image: The C28 adapter connected to a traditional speaker, enabling it to receive audio wirelessly.

6. Maintenance

• Cleaning: Use a soft, dry cloth to clean the device. Do not use liquid cleaners or aerosols.
• Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
• Battery Care: To prolong battery life, avoid fully discharging the device frequently. Charge it regularly, even if not in use for extended periods.

7. Troubleshooting

• Device won't turn on: Ensure the device is fully charged.
• Cannot pair with a device:
  • Make sure the C28 is in the correct mode (RX for receiving, TX for transmitting).
  • Ensure the C28 and the target device are within the 10-meter working range.
  • Turn off and on both devices, then try pairing again.
  • Clear previous Bluetooth connections on your phone/device if necessary.
• No sound or poor sound quality:
  • Check all cable connections (3.5mm audio plug).
  • Ensure volume levels are adjusted on both the C28 and the connected audio device/source.
  • Verify that the C28 is successfully paired and connected.
  • Reduce interference by moving away from other wireless devices.
• Short battery life: Ensure the device is fully charged before use. Battery life can vary slightly based on usage and environmental factors.

8. User Tips

• Charging while in use: The C28 can be used while it is charging, providing continuous operation without interruption. This is particularly useful for longer listening sessions or when using it in a car.
• Dustproof Film: The product display comes with a protective dustproof film. It is recommended to remove this film after receiving the product for optimal clarity.
• Compact Design: The elbow design and small size (approximately 2.3 cm tall when plugged in) make it ideal for use in tight spaces, such as car dashboards, without obstructing other controls.

Image: The C28 adapter connected to a PC, demonstrating its power indicator for instant awareness of its operational status.

Image: The C28 adapter plugged into a car's AUX port, showcasing its space-saving elbow design.

9. Warranty and Support

For detailed warranty information, technical support, or further assistance, please refer to the comprehensive user manual PDF available online or contact DISOUR customer support.

You can access the full user manual PDF here: DISOUR Upgrade C28 User Manual (PDF)

When contacting support, please provide your product model "Upgrade C28" and brand "DISOUR" for quicker service.