VAORLO JS4 Bluetooth 5.4 Audio Receiver Transmitter User Manual

1. Introduction

The VAORLO JS4 is a versatile 2-in-1 Bluetooth 5.4 audio adapter designed to seamlessly integrate wireless audio into your life. It functions as both a Bluetooth receiver (RX) and a Bluetooth transmitter (TX), allowing you to connect a wide range of audio devices wirelessly. Featuring an LED HD digital display, TF card playback, and multipoint connection capabilities, the JS4 offers a high-fidelity audio experience for home, car, and travel use, including aircraft entertainment systems.

2. Package Contents

Please check the box for the following items:

• 1x VAORLO JS4 Bluetooth 5.4 Audio Adapter
• 1x Type-C Charging Cable
• 1x User Manual
• (Optional: 1x Aircraft Audio Converter, if purchased as part of the 'With AP Converter' set)

Note: TF/SD Card is not included.

3. Controls and Indicators

• AUX Plug: 3.5mm audio jack for connecting to audio sources or output devices.
• Plug Protection Cover: Protects the AUX plug when not in use.
• TF Card Slot: For inserting a TF (MicroSD) card for direct audio playback.
• LED Digital Display Screen: Shows working status, Bluetooth mode (RX/TX), and battery level.
• '-' Button: Short press for previous song (in RX mode) or long press to decrease volume.
• '+' Button: Short press for next song (in RX mode) or long press to increase volume.
• TX/OFF/RX Switch Button: Slides to select Transmitter mode (TX), power off (OFF), or Receiver mode (RX).
• Mic: Built-in microphone for hands-free calling (RX mode only).
• Charging Port: Type-C port for charging the device.
• Multi-Function Button: Short press to play/pause music or answer/hang up calls. Long press to reject calls. Double-click to search for a second wireless device in TX mode.

4. Setup

4.1. Charging the Device

1. Connect the provided Type-C charging cable to the charging port on the JS4 adapter.
2. Connect the other end of the cable to a DC 5V power source (e.g., a 5V1A USB charger, computer USB port).
3. The LED display will indicate charging status. A full charge takes approximately 2 hours.
4. The device supports charging while in use.

Recommendation: Use a 5V1A charger to protect battery life.

4.2. Power On/Off

• Power On: Slide the TX/OFF/RX switch button to either 'TX' or 'RX' position. The LED display will light up.
• Power Off: Slide the TX/OFF/RX switch button to the 'OFF' position. The LED display will turn off.

5. Operating Modes

5.1. RX Mode (Receiver)

In RX mode, the JS4 receives Bluetooth audio from your phone/tablet and outputs it to a wired speaker, headphone, or car audio system.

1. Switch to RX Mode: Slide the TX/OFF/RX switch button to the 'RX' position. The 'RX' indicator on the LED display will light up, and the Bluetooth pairing indicators (1st and 2nd lights) will flash, indicating it's ready for pairing.
2. Connect to Audio Output: Insert the JS4's 3.5mm AUX plug into the AUX input jack of your wired speaker, car audio system, or wired headphones.
3. Pair with Phone/Tablet:
   • On your first mobile device (e.g., phone), enable Bluetooth and search for 'JS4'. Select it to pair.
   • Once successfully paired, the 1st Bluetooth indicator on the JS4 will remain on.
   • To connect a second device, enable Bluetooth on your second mobile device (e.g., tablet), search for 'JS4', and pair. The 2nd Bluetooth indicator on the JS4 will then remain on.
4. Play Music: Start playing audio on your connected mobile device. The sound will be transmitted wirelessly to the JS4 and then outputted to your wired audio system.
5. Controls:
   • Play/Pause: Short press the Multi-Function Button.
   • Next Track: Short press the '+' button.
   • Previous Track: Short press the '-' button.
   • Volume Up: Long press the '+' button.
   • Volume Down: Long press the '-' button.
   • Answer/Hang Up Call: Short press the Multi-Function Button when there is an incoming call.
   • Reject Call: Long press the Multi-Function Button when there is an incoming call.

5.2. TX Mode (Transmitter)

In TX mode, the JS4 transmits audio from a wired source (e.g., TV, PC, MP3 player) to wireless Bluetooth headphones or speakers.

1. Switch to TX Mode: Slide the TX/OFF/RX switch button to the 'TX' position. The 'TX' indicator on the LED display will light up, and the Bluetooth pairing indicators (1st and 2nd lights) will flash, indicating it's searching for wireless devices.
2. Connect to Audio Source: Insert the JS4's 3.5mm AUX plug into the audio output jack of your TV, PC, MP3 player, or other audio source.
3. Pair with Wireless Headphones/Speakers:
   • The JS4 will automatically search for nearby wireless speakers or headphones and pair with them. After successful pairing, the 1st Bluetooth indicator will remain on, and the 2nd light will turn off.
   • To connect a second wireless device, double-click the Multi-Function Button. The JS4 will search for another device. After successful connection, the 2nd Bluetooth indicator will remain on.
4. Play Music: Start playing audio from your wired source device. The sound will be transmitted wirelessly to your connected Bluetooth headphones or speakers.
5. Controls:
   • Play/Pause: Short press the Multi-Function Button.
   • Volume Up: Long press the '+' button.
   • Volume Down: Long press the '-' button.

5.3. TF Card Playback

The JS4 supports direct audio playback from a TF (MicroSD) card in both RX and TX modes.

1. Insert TF Card: Insert a TF card (up to 64GB) containing lossless audio files into the TF card slot.
2. Switch to TF Mode: After inserting the TF card, long press the Multi-Function Button to switch to TF card playback mode. The LED display will show 'TF'.
3. Playback: The device will automatically begin playing audio from the TF card.
4. Controls: Use the '+', '-', and Multi-Function buttons for playback control (play/pause, next/previous, volume).

6. Dual Connection (Multipoint)

The VAORLO JS4 supports connecting two devices simultaneously in both RX and TX modes.

• RX Mode: Connect two mobile phones to the JS4 simultaneously. You can switch between the audio sources from the two phones.
• TX Mode: Connect two Bluetooth headsets or speakers to the JS4 simultaneously, allowing two people to listen to the same audio source.

Note: Audio latency may be amplified in dual mode. For optimal performance, use the same Bluetooth headset/speaker or audio format encoding.

7. Aircraft Use (Optional)

For an enhanced listening experience during flights, the JS4 can be used with an optional Aircraft Audio Converter (if purchased as part of the 'With AP Converter' set).

1. Connect Converter: Plug the Aircraft Audio Converter into the headphone jack of your aircraft seat.
2. Connect JS4: Plug the JS4 adapter (in TX mode) into the Aircraft Audio Converter.
3. Pair Headphones: Pair your wireless Bluetooth headphones with the JS4.
4. Enjoy Audio: You can now listen to the in-flight entertainment wirelessly through your Bluetooth headphones.

8. Specifications

9. Troubleshooting

• Device not powering on: Ensure the battery is charged. Connect the device to a power source using the Type-C cable.
• Cannot pair in RX mode: Make sure the switch is in 'RX' position. Ensure your phone/tablet's Bluetooth is enabled and searching for devices. If already paired with two devices, disconnect one to pair a new one.
• Cannot pair in TX mode: Make sure the switch is in 'TX' position. Ensure your wireless headphones/speakers are in pairing mode. If already paired with two devices, double-click the Multi-Function Button to search for a new device.
• No sound: Check if the JS4 is correctly connected to the audio output (RX mode) or audio input (TX mode). Ensure volume levels are adequate on both the JS4 and the connected devices. Verify successful Bluetooth pairing.
• Poor audio quality or disconnections: Ensure the device is within the 10-meter operating range. Avoid obstacles that may interfere with the Bluetooth signal. Fully charge the device.
• Microphone not working: The microphone only functions in RX (receiver) mode. Ensure the device is in RX mode and connected to a phone for calls.

10. User Tips

• Maximize Battery Life: While the device supports charging while in use, for optimal battery longevity, try to fully charge it before extended use.
• Clear Display: The LED HD Digital Display provides clear information on mode and battery. Keep an eye on it to manage your connections and power.
• TF Card Convenience: Load your favorite music onto a TF card for direct playback without needing a Bluetooth source device. This is great for situations where you want to save phone battery or don't have a signal.
• Aircraft Audio: If you travel frequently, consider purchasing the 'With AP Converter' set for seamless wireless audio on airplanes.
• Cable Durability: The braided audio cable is designed for bending resistance. This makes it suitable for use in various environments like car armrests or wall-mounted TVs.

11. 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.
• Handle with Care: Avoid dropping the device or subjecting it to strong impacts.
• Protect Ports: Keep the AUX plug protection cover on when not in use to prevent dust and damage.

12. Warranty and Support

For any issues, questions, or support needs, please contact the seller or manufacturer directly. Refer to your purchase documentation for specific warranty terms and contact information.