VAORLO C83Plus Bluetooth 5.4 Digital Display Transmitter Receiver User Manual

1. Product Overview

The VAORLO C83Plus is a versatile Bluetooth 5.4 audio adapter designed to seamlessly integrate wireless audio into various devices. It functions as both a Bluetooth receiver (RX) and a transmitter (TX), featuring a high-definition color LED display, built-in microphone, and support for lossless stereo sound quality. Its compact design and long-lasting battery make it ideal for use in cars, airplanes, with TVs, computers, and home audio systems.

Figure 1: VAORLO C83Plus Bluetooth Adapter highlighting TX mode, dual stream, multipoint connect, high color LED display, receive/transmit 2-in-1, built-in microphone, and lossless stereo.

Key Features:

• Bluetooth 5.4 Technology: Ensures better compatibility, stability, and is backward compatible with older Bluetooth versions.
• 2-in-1 Functionality (RX & TX Modes): Easily switch between receiving and transmitting audio signals.
• High-Definition Color LED Display: Clearly shows working status, Bluetooth mode, and battery level.
• Lossless Stereo Sound Quality: High-resolution restoration for a CD-level music experience.
• Built-in High-Definition Microphone: Supports hands-free calls and navigation in RX mode.
• Multipoint Connection: Connects to two Bluetooth headsets/speakers simultaneously in TX mode, or two mobile phones in RX mode.
• Long Battery Life: Built-in 250mAh rechargeable battery provides approximately 9-11 hours of continuous listening.
• Bending Resistant Plug: Designed for use in narrow environments like wall-mounted TVs or car armrest boxes.
• Active Search (TX Mode): Actively scans and displays nearby Bluetooth audio devices for easy pairing.

2. Package Contents

Please check the package for the following items:

• 1x C83Plus Bluetooth Audio Adapter
• 1x Type-C Charging Cable
• 1x User Manual
• (Optional: If purchased, 1x Aircraft Audio Converter will be included in the 'With AP Adapter' set.)

3. Setup Instructions

3.1 Charging the Device

Before first use, fully charge the C83Plus adapter. Use the provided Type-C charging cable and a 5V1A charger for optimal battery health. The device takes approximately 2 hours to fully charge.

Figure 2: Internal components of the C83Plus, highlighting the 250mAh battery and Type-C charging port for fast charging.

3.2 Basic Connection Steps

Follow these simple steps to connect your VAORLO C83Plus:

1. Power On & Connect: Press and hold the multifunction key to turn on the device. Connect the C83Plus to your audio source (in TX mode) or audio output device (in RX mode) using the 3.5mm AUX input/output interface.
2. Select Mode: Use the RX/TX lever or button (if applicable) to select the desired mode (Receiver or Transmitter). The color LED display will indicate the current mode.
3. Pairing: Proceed to the 'Operating Instructions' section for detailed pairing steps for your chosen mode.

Figure 3: Visual guide for the three-step connection process: 1. Power on, connect, select mode. 2. Pairing instructions for RX and TX modes, including connecting two devices. 3. Enjoy music.

4. Operating Instructions

4.1 Receiver (RX) Mode

In RX mode, the C83Plus adds Bluetooth wireless functionality to wired speakers, headphones, car stereos, or home audio systems. It receives audio signals from Bluetooth-enabled devices like mobile phones or tablets.

Figure 4: The C83Plus in RX mode, connected to an active speaker, receiving audio from nearby mobile phones.

Pairing in RX Mode:

1. Ensure the C83Plus is in RX mode and connected to your wired audio device.
2. On your mobile phone or tablet, open Bluetooth settings.
3. Search for 'C83plus' in the list of available devices and select it to connect.
4. Once connected, the device name will be displayed on the C83Plus screen.

Multipoint Connection (RX Mode):

The C83Plus supports connecting to two mobile phones simultaneously in RX mode. You can switch between music playback from either phone freely.

Hands-Free Calling (RX Mode):

With its built-in microphone, the C83Plus supports hands-free calls when in RX mode. Use the multifunction key for call management:

• Answer Call: Short press the multifunction key when an incoming call rings.
• Refuse Call: Long press the multifunction key for the duration of an incoming call.
• Hang Up: Short press the multifunction key during a call.

Figure 5: The C83Plus seamlessly integrates into a car, enabling wireless music, navigation broadcasts, and hands-free calls. Call control functions are illustrated.

Lyrics Display (RX Mode):

The C83Plus can display synchronized lyrics on its screen in RX mode. This feature currently supports only English lyrics, and the music file must contain embedded lyrics for them to be displayed.

4.2 Transmitter (TX) Mode

In TX mode, the C83Plus adds Bluetooth functionality to devices without it, such as TVs, computers, or MP3/MP4 players. It transmits audio wirelessly to Bluetooth headphones or speakers.

Figure 6: The C83Plus connected to a TV, enabling wireless audio transmission to headphones for private listening.

Pairing in TX Mode (Active Search):

1. Ensure the C83Plus is in TX mode and connected to your audio source (e.g., TV, computer).
2. Turn on your wireless headphones or speakers and put them into pairing mode.
3. The C83Plus will actively scan for nearby Bluetooth audio devices and display their pairing names on its screen.
4. Use the up and down keys on the C83Plus to select the desired device.
5. Press the multifunction key to confirm the connection. The connected device's name will appear in white on the screen.

Figure 7: The C83Plus display in TX mode, showing a list of actively searched nearby wireless audio devices for selection, preventing blind connections.

Multipoint Connection (TX Mode):

The C83Plus supports connecting to two Bluetooth headsets or speakers simultaneously in TX mode. This allows two users to listen to the same audio source wirelessly.

Note: For the best experience in dual-stream TX mode, use the same model of Bluetooth headset/speaker or devices with the same audio format encoding. Audio latency may be amplified in dual mode, potentially reaching up to 50ms.

Airplane Use (TX Mode):

For long-distance flights, insert the C83Plus into the headphone jack of your airplane seat's entertainment system. Pair your wireless headphones to the C83Plus to enjoy movies and audio wirelessly.

Figure 8: A user enjoying an in-flight movie wirelessly by plugging the C83Plus into the airplane's headphone jack and connecting their wireless headphones.

If you have the 'With AP Adapter' set, use the included Aircraft Audio Converter for compatibility with dual-pin airplane audio jacks.

Figure 9: The C83Plus paired with an Aircraft Audio Converter, forming a 'NEW UPGRADE SET' suitable for various scenarios, including airplane entertainment systems.

5. Maintenance

5.1 Cleaning

To clean the C83Plus, gently wipe it with a soft, dry cloth. Do not use liquid cleaners or abrasive materials, as these may damage the device.

5.2 Battery Care

To prolong battery life, avoid fully discharging the device frequently. Charge it regularly, and if storing for an extended period, ensure it has a partial charge (around 50%). Always use a 5V1A charger as recommended.

6. Troubleshooting

6.1 General Issues

• Device not turning on: Ensure the device is fully charged.
• Cannot pair with a device:
  • Ensure the C83Plus is in the correct RX/TX mode.
  • Make sure the target device (phone, headphones, etc.) is in pairing mode.
  • For TX mode, use the active search function on the C83Plus to find and select the device.
  • Ensure both devices are within the 10-meter transmission range.
• No sound or poor sound quality:
  • Check volume levels on both the C83Plus and the connected audio device.
  • Ensure the 3.5mm AUX cable is securely connected.
  • If using multipoint connection in TX mode, ensure both connected devices have compatible audio encoding for optimal performance.
• Lyrics not displaying:
  • Lyrics display is only supported in RX mode.
  • Only English lyrics are currently supported.
  • The music file must contain embedded lyrics.
• Microphone not working: The microphone function is only supported in RX (Receiver) mode for hands-free calling. It is not supported in TX (Transmitter) mode.

7. Specifications

Figure 10: Technical parameter diagram showing the dimensions of the C83Plus adapter.

8. User Tips

• Bluetooth Compatibility: The C83Plus uses Bluetooth 5.4 and is designed for broad compatibility. It should work with most Bluetooth audio devices, including newer models like Apple AirPods, but specific features like Active Noise Cancellation are managed by the headphones themselves, not the adapter.
• Optimal Dual Connection: When using the multipoint connection feature in TX mode (connecting to two headphones/speakers), try to use devices of the same model or with similar audio encoding for the best synchronized audio experience.
• Airplane Adapter: If you frequently travel by air, consider the 'With AP Adapter' version for seamless connection to dual-pin airplane entertainment systems.
• Car Use: The bending-resistant plug is particularly useful in car armrest boxes or tight spaces, ensuring durability and a secure connection.

9. Warranty and Support

The VAORLO C83Plus Bluetooth adapter comes with a standard manufacturer's warranty. For warranty claims, technical support, or any product-related inquiries, please contact the seller or VAORLO customer service directly. Keep your purchase receipt as proof of purchase.