1. Introduction
The Nulaxy Air B102 is a versatile 2-in-1 Bluetooth 5.3 wireless audio adapter designed to function as both a transmitter (TX) and a receiver (RX). It enables wireless audio streaming with devices equipped with a 3.5mm audio jack, such as airplane entertainment systems, gym equipment, TVs, gaming consoles, car audio systems, and home stereos. This device supports aptX-Adaptive and aptX-Low Latency for high-quality audio transmission with minimal delay.
Image 1.1: Nulaxy Air B102 Bluetooth Adapter and accessories.
2. Package Contents
- Nulaxy Air B102 Bluetooth Adapter
- 3.5mm Audio Cable (integrated)
- Dual-pin Airplane Adapter
- USB-C Charging Cable
- User Manual
3. Device Overview
Image 3.1: Nulaxy Air B102 device components.
- Power Button: Press and hold to power on/off. Short press for play/pause.
- Mode Switch: Toggle between Transmitter (TX) and Receiver (RX) modes.
- LED Indicator: Displays device status (pairing, connected, charging).
- 3.5mm Audio Jack: Integrated cable for audio input/output.
- USB-C Port: For charging the device.
4. Setup and Pairing
4.1. Charging the Device
Before first use, fully charge the Nulaxy Air B102 using the provided USB-C cable. Connect the USB-C end to the device and the other end to a standard USB power adapter (not included). The LED indicator will show charging status.
4.2. Power On/Off
- Power On: Press and hold the Power Button for approximately 3 seconds until the LED indicator lights up.
- Power Off: Press and hold the Power Button for approximately 3 seconds until the LED indicator turns off.
4.3. Switching Modes (TX/RX)
Use the mode switch on the side of the device to select either Transmitter (TX) or Receiver (RX) mode. Ensure the device is powered off before switching modes for optimal performance.
4.4. Transmitter (TX) Mode Pairing
In TX mode, the Nulaxy Air B102 transmits audio from a non-Bluetooth device to Bluetooth headphones or speakers.
4.4.1. First Time Pairing (Single Headphone)
- Set the mode switch to TX.
- Power on the Nulaxy Air B102. The green LED will flash, indicating it is in pairing mode.
- Place your Bluetooth headphones (e.g., AirPods) into their pairing mode. For AirPods, open the lid of the charging case with the AirPods inside.
- Keep the Nulaxy Air B102 and your headphones close to each other. They will automatically connect. The green LED on the Nulaxy Air B102 will turn solid once connected.
- Plug the 3.5mm audio cable of the Nulaxy Air B102 into the audio output jack of your desired device (e.g., airplane entertainment system, TV). If using on an airplane with dual jacks, use the included dual-pin adapter.
Image 4.1: TX Mode First Time Pairing.
4.4.2. Dual Headphone Pairing (TX Mode)
To connect a second pair of Bluetooth headphones:
- Ensure the first pair of headphones is already connected to the Nulaxy Air B102.
- Double-click the Power Button on the Nulaxy Air B102. The green LED will flash rapidly.
- Place the second pair of Bluetooth headphones into their pairing mode.
- Keep the devices close. Once connected, the green LED will remain solid.
Image 4.2: TX Mode Dual Headphone Pairing.
4.5. Receiver (RX) Mode Pairing
In RX mode, the Nulaxy Air B102 receives audio from a Bluetooth-enabled device (e.g., smartphone, tablet) and outputs it to a non-Bluetooth audio system (e.g., car stereo, home speakers).
4.5.1. First Time Pairing (Single Device)
- Set the mode switch to RX.
- Power on the Nulaxy Air B102. The blue LED will flash, indicating it is in pairing mode.
- On your Bluetooth-enabled device (e.g., smartphone), go to Bluetooth settings and search for "B102".
- Select "B102" to connect. The blue LED on the Nulaxy Air B102 will turn solid once connected.
- Plug the 3.5mm audio cable of the Nulaxy Air B102 into the AUX-IN port of your audio system (e.g., car stereo, home amplifier).
Image 4.3: RX Mode First Time Pairing.
4.5.2. Dual Device Pairing (RX Mode)
To connect a second Bluetooth-enabled device:
- Ensure the first device is already connected to the Nulaxy Air B102.
- Double-click the Power Button on the Nulaxy Air B102. The orange LED will flash rapidly.
- On your second Bluetooth-enabled device, search for "B102" and connect.
- Once connected, the orange LED will remain solid.
Image 4.4: RX Mode Dual Device Pairing.
4.5.3. Important Pairing Notes
- When pairing AirPods, ensure they are in their charging case with the lid open to enter pairing mode.
- For easier pairing, especially on airplanes, temporarily turn off Bluetooth on nearby mobile phones or tablets before initiating pairing with the Nulaxy Air B102.
5. Operating Instructions
5.1. Transmitter (TX) Mode Usage
Connect the Nulaxy Air B102 to devices that lack Bluetooth functionality but have a 3.5mm audio output.
- In-Flight Entertainment: Plug the adapter into the airplane's audio jack (use the dual-pin adapter if necessary) and connect your wireless headphones to enjoy movies or music.
- Gym Equipment: Connect to gym machines with a 3.5mm audio output to listen to audio through your Bluetooth headphones.
- TVs & Gaming Consoles: Connect to the 3.5mm audio output of your TV or gaming console to stream audio to your Bluetooth headphones or speakers.
Image 5.1: Using Nulaxy Air B102 in TX mode for in-flight entertainment.
Image 5.2: Dual connection feature in TX mode for shared listening.
5.2. Receiver (RX) Mode Usage
Connect the Nulaxy Air B102 to audio systems that lack Bluetooth functionality but have a 3.5mm audio input (AUX-IN).
- Car Audio Systems: Plug the adapter into your car's AUX-IN port and connect your smartphone via Bluetooth to stream music or make hands-free calls (note: hands-free calling functionality depends on the car stereo's capabilities).
- Home Stereo Systems: Connect to your home amplifier or speakers to stream audio from your Bluetooth-enabled devices.
Image 5.3: Using Nulaxy Air B102 in RX mode for car audio.
5.3. Playback Control
When connected, you can typically control playback (play/pause) using the connected Bluetooth headphones/speakers or the source device. The Nulaxy Air B102's power button can also function as a play/pause button with a short press.
6. Maintenance
- Cleaning: Use a soft, dry cloth to clean the device. Avoid liquid cleaners or solvents.
- Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To prolong battery life, avoid fully discharging the device frequently. Charge it regularly, even if not in use for extended periods.
- Avoid Water: This device is not waterproof. Keep it away from water and moisture.
7. Troubleshooting
- Device not powering on: Ensure the device is fully charged. Connect it to a power source using the USB-C cable.
- Cannot pair with headphones/device:
- Ensure the Nulaxy Air B102 is in the correct mode (TX for transmitting, RX for receiving).
- Make sure both the Nulaxy Air B102 and the target device are in pairing mode.
- Turn off Bluetooth on other nearby devices that might interfere with pairing.
- Move the devices closer to each other.
- Restart both the Nulaxy Air B102 and the target device.
- No audio or poor audio quality:
- Check if the 3.5mm audio cable is securely plugged into both the Nulaxy Air B102 and the audio source/destination.
- Ensure the volume on both the Nulaxy Air B102 (if applicable via connected device) and the connected audio device/headphones is turned up.
- Verify that the Nulaxy Air B102 is successfully paired and connected (solid LED indicator).
- If using aptX, ensure both devices support aptX for optimal quality and low latency.
- Test with a different audio cable or source device if possible.
- Dual connection issues: Ensure both headphones/devices are properly in pairing mode when attempting dual connection. Follow the dual pairing steps carefully.
- Limited range or intermittent connection: Reduce the distance between the Nulaxy Air B102 and the connected Bluetooth device. Avoid physical obstructions.
8. Specifications
| Model Number | B102 |
| Bluetooth Version | 5.3 |
| Supported Codecs | aptX-Adaptive, aptX-Low Latency (ensure connected device supports aptX for best experience) |
| Operating Modes | Transmitter (TX), Receiver (RX) |
| Audio Interface | 3.5mm Audio Jack (integrated cable) |
| Charging Port | USB-C |
| Battery Life (TX Mode) | Up to 15 hours |
| Battery Life (RX Mode) | Up to 20 hours |
| Dimensions | Approximately 5.43 x 4.53 x 0.71 inches (Package Dimensions) |
| Weight | Approximately 2.89 ounces |
| Compatible Devices | Headphones, AirPods, Airplane Stereo Systems, Bluetooth Speakers, TVs, Tablets, Computers, Laptops |
Image 8.1: Battery performance overview.
Image 8.2: Advanced Bluetooth 5.3 technology with Qualcomm chipset.
9. Warranty and Support
9.1. Warranty Information
Nulaxy products typically come with a standard manufacturer's warranty. Please refer to the warranty card included in your product packaging or visit the official Nulaxy website for detailed warranty terms and conditions.
9.2. Customer Support
For technical assistance, troubleshooting, or any inquiries regarding your Nulaxy Air B102, please contact Nulaxy customer support:
- Email: support@nulaxy.com
- Website: www.nulaxy.com
Please have your model number (B102) and purchase details ready when contacting support.
