1. Introduction
The VAORLO D600 is a versatile Bluetooth 5.3 audio adapter designed to enhance your audio experience. Powered by the advanced QCC3040 chipset, it functions as both a receiver (RX) and a transmitter (TX), supporting high-quality audio codecs including SBC, AAC, aptX, aptX HD, and aptX Low Latency (aptX LL). This adapter allows you to wirelessly stream audio to or from a wide range of devices, including smartphones, tablets, TVs, PCs, speakers, and headphones. It also supports dual device connections, enabling seamless audio sharing or switching.
2. Safety Information
- Keep the device away from water, moisture, and extreme temperatures.
- Do not attempt to disassemble or repair the device yourself. Refer to qualified personnel for service.
- Use only the specified power supply (DC 5V, Type-C) to avoid damage.
- Avoid prolonged exposure to loud volumes when using headphones with the adapter to prevent hearing damage.
3. Package Contents
- 1 * VAORLO D600 Bluetooth 5.3 Audio Adapter
- 1 * User Manual
- 1 * RCA Audio Cable
- 1 * 3.5MM Aux Cable
- 1 * Type-C Charging Cable
4. Product Overview
Familiarize yourself with the components and controls of your VAORLO D600 adapter.

Figure 4.1: Front view of the D600 adapter showing controls and indicator lights.

Figure 4.2: Rear view of the D600 adapter showing input/output interfaces and antenna.
Controls and Indicators:
- POWER Indicator: Red light indicates power status.
- RX/TX Switch: Toggles between Receiver and Transmitter modes.
- Codec Indicators (SBC, AAC, X, HD, LL): Lights indicate the currently active audio codec. 'X' stands for aptX.
- A/B Indicators: Show which of the two connected Bluetooth devices is active.
- Bluetooth Pairing Button: Initiates Bluetooth pairing.
- Previous Song / Volume - Button: Short press for previous track, long press for volume down.
- Play/Pause Button: Controls media playback.
- Next Song / Volume + Button: Short press for next track, long press for volume up.
Interfaces:
- DC 5V (Type-C) Port: For power supply.
- AUX (3.5mm) Port: Audio input/output.
- RCA (L-AUDIO-R) Ports: Audio input/output.
- Antenna: For improved Bluetooth signal range and stability.
5. Setup and Connection
5.1 Powering the Device
- Connect the provided Type-C charging cable to the DC 5V port on the adapter.
- Plug the other end of the Type-C cable into a 5V USB power source (e.g., USB wall adapter, computer USB port). The POWER indicator will light up.
Note: The D600 does not have a built-in battery and requires continuous power via the Type-C port.
5.2 Receiver (RX) Mode Setup
In RX mode, the D600 receives Bluetooth audio from your mobile device (phone, tablet, laptop) and outputs it to a wired audio system (speakers, headphones, car audio).

Figure 5.1: Connecting the D600 in Receiver (RX) mode.
- Switch the RX/TX toggle to RX mode.
- Connect the D600 to your wired audio device (e.g., speakers, headphones, car audio) using either the 3.5mm AUX cable or the RCA audio cable.
- On your mobile device, enable Bluetooth and search for available devices. Select "VAORLO D600" from the list to pair.
- Once paired, the RX indicator and the active codec indicator (e.g., SBC, AAC, aptX) will light up. You can now stream audio from your mobile device to your wired audio system.
5.3 Transmitter (TX) Mode Setup
In TX mode, the D600 transmits audio from a wired source (TV, PC) via Bluetooth to a Bluetooth-enabled audio device (Bluetooth speaker, Bluetooth headset).

Figure 5.2: Connecting the D600 in Transmitter (TX) mode.
- Switch the RX/TX toggle to TX mode.
- Connect the D600 to your audio source (e.g., TV, PC) using either the 3.5mm AUX cable or the RCA audio cable.
- Put your Bluetooth receiving device (speaker, headset) into pairing mode.
- Press the Bluetooth pairing button on the D600. The TX indicator will flash, indicating it's searching for devices.
- Once paired, the TX indicator and the active codec indicator will light up. Audio from your source will now be transmitted to your Bluetooth device.
5.4 Dual Connection Support
The D600 supports connecting two Bluetooth devices simultaneously in both RX and TX modes.

Figure 5.3: Dual connection in TX mode, transmitting to two Bluetooth speakers.
- In RX Mode: After pairing the first mobile device, press the Bluetooth pairing button again to pair a second mobile device. You can then switch between the two connected devices to play audio. The A/B indicators will show which device is currently active.
- In TX Mode: After pairing the first Bluetooth receiving device, put the second Bluetooth receiving device into pairing mode and press the Bluetooth pairing button on the D600 again. Both devices will receive audio simultaneously. The A/B indicators will show both connections.
6. Operating Instructions
6.1 Basic Playback Controls
- Play/Pause: Press the central Play/Pause button.
- Volume Up: Long press the 'Next Song / Volume +' button.
- Volume Down: Long press the 'Previous Song / Volume -' button.
- Next Track: Short press the 'Next Song / Volume +' button.
- Previous Track: Short press the 'Previous Song / Volume -' button.
6.2 Codec Indication
The D600 automatically selects the best available audio codec based on the connected device. The corresponding indicator light (SBC, AAC, X, HD, LL) will illuminate to show the active codec. 'X' indicates aptX.
7. Maintenance
- Clean the device with a soft, dry cloth. Do not use liquid cleaners or aerosols.
- Store the adapter in a cool, dry place when not in use.
- Avoid dropping or subjecting the device to strong impacts.
8. Troubleshooting
- No Power: Ensure the Type-C cable is securely connected to a 5V power source and the adapter. Try a different cable or power adapter.
- Cannot Pair: Make sure the D600 is in the correct RX or TX mode. Ensure your other Bluetooth device is in pairing mode. Move the devices closer together and away from potential interference sources. Try resetting both devices.
- No Sound: Check all audio cable connections (AUX/RCA). Verify the volume levels on both the D600 and the connected audio device/source. Ensure the correct input/output is selected on your audio system. Confirm the D600 is successfully paired and the correct codec indicator is lit.
- Poor Audio Quality/Intermittent Connection: Reduce the distance between the D600 and the paired Bluetooth device. Remove any obstacles between them. Avoid using the device near Wi-Fi routers or other strong wireless signals. Ensure the audio source is providing a clean signal.
- aptX/aptX HD/LL Not Activating: Ensure both the D600 and the connected Bluetooth device support the desired aptX codec. If only SBC or AAC lights up, it means the other device does not support aptX or a higher codec.
9. Specifications

Figure 9.1: Detailed product specifications.
| Attribute | Value |
|---|---|
| Product Name | Qualcomm Bluetooth audio adapter |
| Product Model | D600 |
| Bluetooth Version | V5.3 |
| Input Power | DC 5V |
| Power Supply Mode | Type-C |
| Product Material | ABS |
| Distance (Accessibility) | 30m |
| Product Color | Black |
| Product Features | Receive/Transmit (2-in-1) |
| Adaptive Interface | AUX, RCA, USB-C |
| Bluetooth Decoding | SBC/AAC/Aptx HD/Aptx LL |
| Chipset | QCC3040 |
10. User Tips
- For optimal audio quality, ensure both the D600 and your connected audio device support the same high-fidelity codecs (aptX HD, aptX LL).
- When experiencing connection issues, try restarting both the D600 and the paired device.
- If using in TX mode with a TV, check your TV's audio output settings to ensure it's sending audio through the connected AUX or RCA ports.
- The 30m accessibility range is an ideal scenario; actual range may vary depending on environmental factors and obstacles.
11. Warranty and Support
For warranty information, technical support, or service inquiries, please contact the seller or manufacturer directly through your purchase platform. Keep your proof of purchase for any warranty claims.