VAORLO C83 Pro

Contents

VAORLO C83 Pro Bluetooth 5.4 Audio Adapter User Manual

2-in-1 Wireless Receiver & Transmitter with Microphone

1. Product Overview

The VAORLO C83 Pro is a versatile 2-in-1 Bluetooth 5.4 audio adapter designed to seamlessly integrate wireless audio into various devices. It functions as both a Bluetooth transmitter (TX mode) and a Bluetooth receiver (RX mode), offering high-fidelity sound quality and the ability to connect to two devices simultaneously.

VAORLO C83 Pro Bluetooth 5.4 Audio Adapter
Figure 1: VAORLO C83 Pro Bluetooth 5.4 Audio Adapter, highlighting 2-in-1 functionality, dual device support, receive/transmit modes, HIFI sound, and Bluetooth 5.4.

Key Features:

  • 2-in-1 Functionality: Easily switch between Bluetooth Transmitter (TX) and Receiver (RX) modes.
  • Bluetooth 5.4: Equipped with high-performance wireless 5.4 chips for better compatibility, stability, enhanced transmission, fast response, and smooth connection, reducing delays and lagging.
  • Built-in Microphone: Supports wireless music listening, hands-free calls, and navigation in RX mode. (Note: Microphone function is not supported in TX mode).
  • Dual Link: Connects to two wireless earphones/speakers in TX mode or two mobile phones in RX mode simultaneously.
  • High-Fidelity Sound: Supports SBC high-definition decoding for clear and high-quality audio.
  • Long-lasting Battery: Approximately 13.5 hours in receive mode and 9 hours in transmit mode on a single charge.
  • 10-meter Transmission: Stable long-distance transmission up to 10 meters, even through obstacles.
  • Bending Resistant Plug: Durable design suitable for various environments like car armrests or wall-mounted devices.

2. Package Contents

  • 1 x VAORLO C83 Pro Wireless Audio Adapter
  • 1 x Type-C Charging Cable
  • 1 x User Manual

3. Setup

3.1 Charging the Device

Before first use, fully charge the adapter using the provided Type-C charging cable. A full charge takes approximately 2 hours.

Battery capacity and charging time
Figure 2: Battery capacity (250mAh) and approximate battery life: 2 hours charging, 13.5 hours receive mode, 9 hours transmit mode.

3.2 Initial Pairing

  1. Power On: Long press the multifunctional button on the device to turn it on.
  2. Connect Audio Source/Output: Connect the adapter to your desired audio input/output interface (e.g., 3.5mm AUX port of a car stereo, TV, PC, or headphones).
  3. Select Mode: Adjust the 'RX/TX' lever to select the desired mode (RX for receiving, TX for transmitting).
  4. Pairing:
    • In Receive Mode (RX): Open Bluetooth settings on your mobile phone, search for "C83Pro", and click "Connect". The display screen will show a headphone icon continuously when connected.
    • In Transmit Mode (TX): Turn on your wireless headphones or speakers and enter pairing mode. Double-click the "*" button on the adapter to search for nearby devices and connect. The display screen will show a headphone icon continuously when connected.
Automatic reconnection after initial pairing
Figure 3: After successful initial pairing, the device will automatically connect upon startup, simplifying future use.
Connection operation instructions
Figure 4: Step-by-step connection operation instructions for both RX and TX modes, including pairing methods for single and dual devices.

4. Operating Instructions

4.1 Switching Modes (RX/TX)

Use the physical switch on the side of the adapter to toggle between Receiver (RX) and Transmitter (TX) modes. Ensure the correct mode is selected for your intended use.

Integrated receive and transmit modes
Figure 5: Visual explanation of integrated receive (RX) and transmit (TX) modes with examples of connected devices.

4.2 Receive Mode (RX) Applications

In RX mode, the adapter receives Bluetooth audio from your smartphone or tablet and outputs it to wired speakers, car audio systems, or regular earphones via the 3.5mm AUX cable. This rejuvenates old equipment by adding wireless capabilities.

  • Car Audio: Connect the adapter to your car's AUX input to stream music and navigation wirelessly from your phone.
  • Home Stereo: Connect to an old-fashioned audio system or amplifier to enjoy wireless music.
  • Wired Headphones: Turn your wired headphones into Bluetooth headphones.
RX-Receive mode in a car
Figure 6: RX-Receive mode in a car, showing the adapter turning a car audio system into a wireless system for music and navigation.
RX-Receive mode for upgrading old equipment
Figure 7: RX-Receive mode for upgrading old equipment, connecting to a vintage audio system.

4.3 Transmit Mode (TX) Applications

In TX mode, the adapter transmits audio from non-Bluetooth devices (like TVs, PCs, or game consoles) to Bluetooth headphones or speakers.

  • TV Audio: Connect to your TV's audio output to listen wirelessly with Bluetooth headphones.
  • PC/Computer: Enable wireless audio for your computer, connecting to Bluetooth speakers or headphones.
TX-Transmit mode applications
Figure 8: TX-Transmit mode applications, connecting to a computer or TV for wireless audio.

4.4 Hands-Free Calling (RX Mode Only)

The built-in microphone supports hands-free calling when the device is in RX (Receiver) mode.

  • Answer Incoming Calls: Short press the multifunctional button.
  • Hang Up Call: Short press the multifunctional button during a call.
  • Reject Incoming Calls: Long press the multifunctional button.
Hands-free call instructions
Figure 9: Diagram illustrating hands-free call operations: short press to answer, short press during call to hang up, long press to reject.

The adapter supports connecting to two devices simultaneously:

  • In TX Mode: Pair with two wireless earphones or Bluetooth speakers at the same time to share audio.
  • In RX Mode: Connect to the Bluetooth of two mobile phones simultaneously.
Supports one to two functionality
Figure 10: Visualizing one-to-two functionality for both receive mode (connecting two phones) and transmit mode (connecting two wireless earphones).

5. Maintenance

To ensure the longevity and optimal performance of your VAORLO C83 Pro audio adapter, please follow these maintenance guidelines:

  • Keep Dry: Avoid exposing the device to moisture, rain, or liquids.
  • Clean Gently: Use a soft, dry cloth to clean the adapter. Do not use harsh chemicals or abrasive cleaners.
  • Store Properly: When not in use, store the adapter in a cool, dry place away from direct sunlight and extreme temperatures.
  • Handle with Care: The bending-resistant plug is durable, but avoid excessive force or sharp bends to prevent damage.
Bending resistant plug for multiple environments
Figure 11: Image demonstrating the bending-resistant plug suitable for various environments.

6. Troubleshooting

  • Device not powering on: Ensure the device is fully charged. Connect it to a power source using the Type-C cable and try again.
  • Cannot pair with a device:
    • Ensure the adapter is in the correct RX or TX mode.
    • Make sure the adapter is in pairing mode (indicated by flashing lights, refer to Figure 4).
    • Ensure the target device's Bluetooth is enabled and discoverable.
    • Move the adapter closer to the target device (within 10 meters).
    • Try restarting both the adapter and the target device.
  • No sound or poor audio quality:
    • Check if the 3.5mm AUX cable is securely connected to both the adapter and the audio source/output.
    • Verify that the volume on both the adapter and the connected device is turned up.
    • Ensure the adapter is in the correct RX/TX mode for your setup.
    • If using dual link, note that audio latency may be amplified (up to 200ms).
  • Microphone not working: The built-in microphone only supports hands-free calling in RX (Receiver) mode. It is not supported in TX (Transmitter) mode.
  • Signal drops or unstable connection:
    • Ensure the adapter is within the 10-meter transmission range.
    • Minimize physical obstructions (walls, large objects) between the adapter and the connected device.
    • Avoid strong electromagnetic interference from other electronic devices.
    10-meter long-distance transmission diagram
    Figure 12: Illustration of 10-meter long-distance transmission, showing signal strength and stability even through walls.
  • Delayed audio (lag): The Bluetooth 5.4 chip is designed to minimize lag. If you experience significant delay, ensure your connected devices also support low-latency Bluetooth profiles. Note that dual link mode can introduce additional latency.
    • Wireless 5.4 chip diagram
    Figure 13: Internal view of the device highlighting the Wireless 5.4 chip, emphasizing enhanced transmission, fast response, and stable connection to reduce lag.

7. Specifications

FeatureDescription
Product Name2-in-1 Wireless Audio Adapter
Product ModelC83Pro
Bluetooth VersionV5.4
Transmission DistanceUp to 10 meters (open area, no obstacles)
Power Supply MethodType-C interface
Product Size130mm * 28.5mm * 13.4mm (approximately)
Basic FunctionsWireless audio reception/transmission
Features and FunctionsConnects two mobile phones/two wireless devices simultaneously
Battery Life (Transmit)Approximately 9 hours
Battery Life (Receive)Approximately 13.5 hours
Microphone SupportYes, in RX Receiver Mode for Hands-free Calling
Audio Interface3.5mm AUX
Product parameters table and dimensions
Figure 14: Product parameters table and approximate dimensions (130mm length, 28.5mm width, 13.4mm height).

8. User Tips

  • Microphone Functionality: Remember that the built-in microphone is only active and supports hands-free calling when the adapter is in Receiver (RX) mode. It will not function for calls in Transmitter (TX) mode.
  • Dual Link Latency: While the dual link feature allows sharing audio with two devices, be aware that audio latency may be amplified in this mode, potentially reaching up to 200ms. This might be noticeable in applications requiring precise audio-video synchronization.
  • Automatic Reconnection: After the initial successful pairing, the adapter is designed to automatically reconnect to previously paired devices upon startup, making subsequent uses quick and convenient.
  • Versatile Use: The bending-resistant 3.5mm plug makes this adapter highly adaptable for various setups, including tight spaces in car armrests or behind wall-mounted televisions.
Adapter replacing wired controls
Figure 15: The adapter offers a wireless solution for traditional wired controls in both car and home environments.

9. Warranty and Support

For warranty information, technical support, or any questions regarding your VAORLO C83 Pro Bluetooth 5.4 Audio Adapter, please refer to the contact information provided by your retailer or the manufacturer's official website. Keep your purchase receipt as proof of purchase for warranty claims.

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