VAORLO C83Pro 2-in-1 Bluetooth 5.4 Audio Transmitter Receiver User Manual

1. Introduction & Package Contents

The VAORLO C83Pro is a versatile 2-in-1 Bluetooth 5.4 audio adapter designed to enhance your audio experience. It functions as both a Bluetooth transmitter (TX) and receiver (RX), allowing you to wirelessly connect various audio devices. With its advanced Bluetooth 5.4 chip, it offers improved compatibility, stability, and low-latency audio transmission. The C83Pro supports multipoint connections, enabling you to connect to two Bluetooth headsets or speakers simultaneously in TX mode, or two mobile phones in RX mode.

Package Contents

• 1x C83Pro Bluetooth Audio Adapter
• 1x Type-C Charging Cable
• 1x User Manual
• (Optional: 1x Aircraft Audio Converter, if purchased as part of a set)

Image: VAORLO C83Pro 2-in-1 Bluetooth 5.4 Audio Adapter, showcasing its compact design and key features.

2. Product Specifications

Image: Detailed product parameters and dimensions for the C83Pro.

3. Device Overview and Controls

Familiarize yourself with the buttons and ports on your C83Pro adapter:

Image: VAORLO C83Pro Bluetooth Audio Adapter with labeled AUX plug, multifunction key, volume/track buttons, TX/RX switch, charging port, and indicator lights.

• AUX Plug: 3.5mm audio connector.
• Multifunction Key (M): Used for power, play/pause, and call functions.
• Volume/Track Buttons (< / >): Short press for previous/next track, long press for volume down/up.
• TX/RX Switch Button: Toggles between Transmitter (TX) and Receiver (RX) modes.
• Charging Port: Type-C port for charging.
• Indicator Lights (1 & 2): Indicate connection status.
• RX Indicator Light: Illuminates when in Receiver mode.
• TX Indicator Light: Illuminates when in Transmitter mode.
• Charging Indicator Light: Shows charging status.

4. Basic Operation

4.1 Power On/Off

• Power On: Long press the Multifunction Key (M).
• Power Off: Long press the Multifunction Key (M).

4.2 Music Control

• Play/Pause: Single click the Multifunction Key (M).
• Next Track: Single click the '>' button.
• Previous Track: Single click the '<' button.
• Volume Up: Long press the '>' button.
• Volume Down: Long press the '<' button.

4.3 Call Functions (RX Mode Only)

The C83Pro supports hands-free calling when in Receiver (RX) mode, thanks to its built-in HD microphone.

• Answer Incoming Call: Single click the Multifunction Key (M).
• Hang Up Call: Single click the Multifunction Key (M) during a call.
• Reject Incoming Call: Long press the Multifunction Key (M) for 2 seconds.
• Redial Last Number: Double click the Multifunction Key (M).

Image: The C83Pro's hands-free calling features, including answering, hanging up, and rejecting calls, shown in a car environment.

5. Pairing Instructions

5.1 Mode Selection (RX / TX)

The C83Pro features a dedicated switch to change between Receiver (RX) and Transmitter (TX) modes. Ensure the correct mode is selected for your intended use.

Image: Visual guide for switching between RX (Receive) and TX (Transmit) modes.

5.2 Pairing in RX Mode (Receiver)

Use RX mode to receive audio from your phone, tablet, or laptop and play it through wired speakers, car audio systems, or wired headphones.

1. Insert the C83Pro's AUX plug into the AUX-IN port of your wired speaker, car audio system, or wired headphones.
2. Long press the Multifunction Key (M) to power on the adapter.
3. Push the mode button to RX. The RX indicator light will be constantly on, and indicator lights 1 and 2 will flash, indicating it's ready for pairing.
4. On your mobile phone or other Bluetooth audio source device, open Bluetooth settings, search for "C83Pro", and select it to pair.
5. After the first device connects successfully, indicator light 1 will remain on. To connect a second mobile phone, the second phone can search for "C83Pro" and connect. After successful connection, indicator light 2 will also remain on.
6. Once successfully connected, you can use the adapter to play music wirelessly.

Note: The first connection may take a few seconds. After successful initial pairing, the adapter will automatically reconnect to your paired devices the next time it's turned on.

Image: C83Pro connected to a car audio system in RX mode, enabling wireless music streaming.

5.3 Pairing in TX Mode (Transmitter)

Use TX mode to transmit audio from non-Bluetooth devices like TVs, PCs, or projectors to Bluetooth headphones or speakers.

1. Insert the C83Pro's AUX plug into the 3.5mm audio output jack of your entertainment device (e.g., TV, PC, projector).
2. Long press the Multifunction Key (M) to power on the adapter.
3. Push the mode button to TX. The TX indicator light will be constantly on, and indicator lights 1 and 2 will flash, indicating it's ready for pairing.
4. Turn on your Bluetooth headphones or speakers and set them to pairing mode.
5. The C83Pro will automatically search for nearby Bluetooth devices. After successful connection, indicator light 1 will remain on.
6. To connect a second Bluetooth headset/speaker, double-click the Multifunction Key (M) to search for the second device. Indicator light 2 will flash again. After the second device is successfully connected, indicator light 2 will also remain on.

Note: If pairing fails, turn off the power, then restart the C83Pro and your Bluetooth headphones/speakers, and try again.

Important for TV Connection: When connecting to a TV, ensure you are using the TV's audio output port (e.g., headphone jack or RCA audio out), not an audio input port.

Image: The C83Pro enabling wireless audio for various devices including car audio, traditional speakers, computers, and televisions.

Image: A smartphone displaying a successful Bluetooth connection to the C83Pro, illustrating the automatic reconnection feature.

Image: The C83Pro adapter paired with an aircraft audio converter, demonstrating its use for wireless audio on airplanes.

6. User Tips & Troubleshooting

6.1 User Tips

• Dual Device Connectivity: The C83Pro supports connecting to two Bluetooth devices simultaneously in both RX and TX modes. This is limited to two devices at a time.
• Optimal TV Audio: When using the C83Pro in TX mode with a TV, always ensure you are plugging the adapter into an audio output port (e.g., headphone jack, RCA audio out) on your television. Connecting to an audio input port will not work.
• Automatic Reconnection: After the initial successful pairing, your C83Pro will automatically reconnect to previously paired devices when powered on, simplifying subsequent use.
• Aircraft Use: If you purchased the "With AP Converter" set, use the included Aircraft Audio Converter to connect the C83Pro to in-flight entertainment systems for a wireless audio experience.

6.2 Troubleshooting

• Device not powering on: Ensure the device is charged. Connect it to a power source using the Type-C cable.
• Cannot pair with a device:
  1. Ensure the C83Pro is in the correct RX or TX mode.
  2. Make sure the C83Pro and the target Bluetooth device are within 10 meters of each other.
  3. Turn off and restart both the C83Pro and the target Bluetooth device, then try pairing again.
  4. In TX mode, double-click the Multifunction Key (M) to re-search for devices.
• No audio or poor audio quality:
  1. Check that the 3.5mm AUX plug is fully inserted into the correct audio port.
  2. In TX mode, ensure you are connecting to an audio output port (e.g., headphone jack, RCA audio out) on your source device, not an input port.
  3. Adjust the volume on both the C83Pro and the connected audio device.
  4. Ensure there are no significant obstacles between the C83Pro and the paired device.
• Connecting two devices in multipoint mode:

  While the C83Pro supports connecting two devices simultaneously, audio latency may be amplified, potentially up to 200ms. For optimal experience, use the same brand/model of Bluetooth headphones/speakers or devices with the same audio format encoding.

• C83Plus (English Version) Lyrics Display:

  If you have the C83Plus model, the function of displaying lyrics simultaneously only supports music with English lyrics, and the music file must contain these lyrics. This feature is not supported in TX mode.

Image: Detailed connection and pairing instructions, useful for troubleshooting initial setup.

7. Maintenance

7.1 Charging

• Connect the provided Type-C charging cable to the C83Pro's charging port and to a standard USB power source (e.g., computer USB port, USB wall adapter).
• A full charge takes approximately 2 hours.
• The charging indicator light will show the charging status.

7.2 Battery Life

• The built-in 250mAh battery provides approximately 13.5 hours of continuous music playback in RX (receiver) mode.
• In TX (transmitter) mode, the battery life is approximately 9 hours.
• The device can be used while charging.

Image: An illustration of the C83Pro's internal battery, detailing its 250mAh capacity and estimated usage times.

7.3 General Care

• Keep the device dry. Do not immerse it in any liquid or rinse it with water.
• Store and operate the device in a normal room temperature environment. Avoid extreme hot or cold conditions.
• Clean the device with a soft, dry cloth.

8. Safety Guidelines

Please read and follow these safety guidelines carefully to ensure safe operation and prolong the life of your device:

• Do not disassemble or modify the C83Pro for any reason. Unauthorized modifications can lead to malfunction, damage, or fire, and will void the warranty.
• Do not immerse the product in any liquid or rinse it with water.
• Use only a charging cable that complies with national/regional safety standards to charge the adapter. Using an incompatible charger may damage the battery or pose a safety risk.
• Operate and store this product in a normal room temperature environment. Avoid exposing the device to excessively low or high temperatures.
• Do not use the device during thunderstorms. Thunderstorms can cause the equipment to malfunction or interrupt signals.

9. Warranty and Support

Your VAORLO C83Pro Bluetooth Audio Adapter comes with a warranty to ensure your satisfaction and product reliability.

9.1 Warranty Service

• In the event of a non-human-induced performance malfunction during normal use, consumers are entitled to a free warranty service for 12 months from the date of purchase.

9.2 Warranty Exclusions

The warranty does not cover the following circumstances:

• Damage caused by human factors (e.g., misuse, accidental damage).
• Product failure occurring after the 12-month warranty period.
• Inability to provide valid proof of purchase.
• Product damage resulting from failure to use, maintain, or care for the product according to the instructions in this manual.
• Unauthorized disassembly, repair, or water immersion of the product.
• Damage caused by other force majeure events.

For further details or support, please refer to the comprehensive user manual available in PDF format: View User Manual (PDF).