Nulaxy BR05 - Wireless Receiver Manual

Basic parameters

Name: Wireless Receiver
Model: J48
BT version: V5.3
Supported protocols: HSP/HFP/A2DP/AVRCP
Audio decoding: SBC
Transmission distance: 10m
Frequency response range: 100Hz-8kHz
Microphone sensitivity: -4±4dB
Working voltage: 3.0—4 2V
Battery capacity: 250mAh
Music time: 16h (70% volume)
Talk time: 15h (70% volume)
Charging time: 15h
Charging input: 5V/1.5mA

Packing list

Pairing operation

1. To initiate the pairing process, press and hold the MFB (Multi-Function Button) for 3 seconds. You will see the red, green, and blue lights on the light ring illuminate simultaneously for 1second. This indicates that the receiver has been turned on. Once the lights on the light ring start cycling through the colors, it means the receiver is ready to pair.
   

2. Activate the Bluetooth function on your phone and search for the "J48" device. Once you find it, connect to it. The receiver will indicate the successful connection by flashing the red, green, and blue lights in a slow, breathing light mode.
   

How to pair with two devices simultaneously?

After successfully pairing the Bluetooth receiver with the first device, turn off the Bluetooth function on that device. This action will put the Bluetooth receiver back into pairing mode. Next, turn on the Bluetooth function of the second device you want to pair with. Open the Bluetooth settings and search for the "J48" device. Once found, select and connect to it. Now, you need to reconnect the first device to the Bluetooth receiver. Turn on the Bluetooth function of the first device and access the Bluetooth settings. From the pairing history or list of previously paired devices, locate and select "J48."

All set! Both of your Bluetooth devices are now successfully connected to the receiver simultaneously. You can enjoy seamless audio streaming or take calls from either device without the need for repeated pairing.

Charging the Device

1. Before using the product for the first time, please fully charge the battery. You can connect the 5V DC power supply to the device using the Type-C charger.
2. When the device is in a low-power state, it is important to promptly charge it using a DC 5V power supply input only. Avoid using a power supply with a voltage higher than 5V, as it may cause damage to the device.

Common operations

1. Turn on/off
   

2. Music functions
   Next song:
   Click to go to the next song.
   Pause/Play:
   Click the multi function button.
   Volume up/down:
   Long press volume+ Long press volume-
   Previous song:
   Click to go to the previous song
   

5. Restore factory settings
   Press the volume up and down buttons simultaneously. Hold for 5 seconds to clear pairing, and keep the red, green, and blue lights on for 1 second.
   

Receiver indicator lights

4. The volume control on the receiver and the phone may operate independently due to different settings (e.g., Android). Adjust the volume settings on both the receiver and the phone if necessary.

Why do I experience stuttering, discontinuity, or electrical noise when using the receiver for music or calls?

1. Verify if the receiver has a low battery, as it can cause poor sound quality or noise.
2. Ensure that the receiver and the connected device are within a range of 10 meters to prevent signal disruption.
3. Strong environmental interference, such as large metal partitions or other sources, can disrupt the receiver's signal.
4. Maintain optimal signal and network conditions on your mobile phone to prevent potential interference or discontinuity during music playback or calls.
5. Inspect the audio cable and ports for any damage. If damage is found, properly insert the audio cable into its designated port or replace it with a new one.

Why is it not possible to charge the receiver?

It is possible that the charging port and cable are not properly connected. Try unplugging and plugging in the charging cable repeatedly to ensure a good connection. Additionally, use adapters that comply with national or regional safety standards and the included charging cable to charge the receiver. Excessive power from incompatible chargers may damage the receiver's battery.

Why is there an error in the digital display of the receiver?

1. During the initial startup after a full charge, it is normal for electronic products to display less than 100% power due to self-power consumption.
2. Electronic products may experience current loss and voltage drop during use. If the receiver's power has been fully depleted and you restart it after a period of time, it is normal for the display to show partial restoration of power.

Safety Criteria

1. Please strictly adhere to the instructions and avoid disassembling or modifying the product for any reason, as it may lead to malfunction or damage.
2. Avoid submerging the product in any liquid or washing it with water. Exposure to water can cause damage to the device and compromise its functionality.
3. Ensure you use an adapter that complies with national or regional safety standards and uses the provided charging cable to charge the receiver. Using an incompatible charger can damage the battery or pose safety hazards.
4. It is important to use and store the product within normal temperature ranges. Avoid exposing it to temperatures below 0ºC or above 45ºC, as extreme temperatures can negatively impact the performance and lifespan of the device.
5. Do not block the openings of the receiver, including the charging port, audio port, or microphone. Blocking these openings can interfere with proper functioning and may lead to overheating.
6. Avoid using the product during thunderstorms or in adverse weather conditions. Doing so may result in abnormal performance or signal interruption, potentially compromising safety and functionality.