VIKEFON Bluetooth 5.0 Transmitter Receiver

1. Introduction

The VIKEFON Bluetooth 5.0 Transmitter Receiver is a versatile 3-in-1 audio adapter designed to bring wireless audio capabilities to a wide range of devices. It functions as a Bluetooth transmitter (TX), a Bluetooth receiver (RX), and offers a bypass mode, allowing you to stream audio wirelessly or integrate it seamlessly into your existing wired audio setup. Featuring Bluetooth 5.0 technology, aptX HD, and aptX Low Latency support, it ensures high-quality audio with minimal delay over long distances.

2. Package Contents

Please verify that all items are present in your package:

• 1 x Bluetooth Transmitter/Receiver Adapter (BT-B21 or BT-B22)
• 1 x Micro USB charging cable (0.5m/19.6in)
• 1 x 3.5mm audio cable (0.5m/19.6in)
• 1 x 3.5mm jack to 2 RCA plug cables
• 1 x Digital Optical Toslink Audio Cable (1m/39.4in)
• 1 x User Manual

3. Product Overview and Specifications

The VIKEFON Bluetooth adapter features a compact design with intuitive controls and multiple connectivity options.

Technical Specifications:

4. Setup and Connections

The device supports three main modes: Receiver (RX), Transmitter (TX), and Bypass. Ensure the device is charged before initial use.

4.1 Powering On/Off

Use the ON/OFF switch located on the side of the device to power it on or off.

4.2 Mode Selection

Press the 'Mode switching' button (labeled with two arrows pointing opposite directions) to cycle between RX, TX, and Bypass modes. The indicator lights will show the active mode.

4.3 RX Receiving Mode (Bluetooth Receiver)

In RX mode, the device receives audio wirelessly from your Bluetooth-enabled smartphone, computer, or tablet and outputs it to a wired audio system (e.g., home stereo, speakers).

1. Switch the device to RX mode.
2. Connect the device's 3.5mm AUX RX Input or Optical In (RX) to your wired audio system using the appropriate cable (3.5mm audio cable or Optical digital cable). For RCA input on your stereo, use the 3.5mm jack to 2 RCA plug cable.
3. Enable Bluetooth on your mobile device and search for the VIKEFON adapter.
4. Select the adapter from the list of available devices to pair.

4.4 TX Transmission Mode (Bluetooth Transmitter)

In TX mode, the device transmits audio wirelessly from a non-Bluetooth audio source (e.g., TV, iPod, PC, CD player) to Bluetooth headphones or speakers.

1. Switch the device to TX mode.
2. Connect your audio source's output to the device's 3.5mm AUX TX Input or Optical In (TX) using the appropriate cable.
3. Put your Bluetooth headphones or speaker into pairing mode.
4. The adapter will automatically search and connect to your Bluetooth audio device. You can also use the 'Quick pairing mode' button if needed.

4.5 Bypass Mode

Bypass mode allows you to connect your TV to a sound device (e.g., soundbar) through the adapter without using Bluetooth. This is useful for switching between wired and wireless audio without disconnecting cables.

1. Switch the device to Bypass mode.
2. Connect your TV's audio output to the device's input (e.g., 3.5mm AUX TX Input or Optical In (TX)).
3. Connect the device's output (e.g., 3.5mm AUX RX Input or Optical In (RX)) to your sound device's input.
4. Audio will pass through the adapter directly to your sound device.

5. Operating Instructions

5.1 Pairing Bluetooth Devices

After selecting the desired mode (RX or TX), the device will typically enter pairing mode automatically. The indicator light will flash to show it's ready to pair.

• Manual Pairing: Press the 'Quick pairing mode' button (rightmost button) to initiate pairing.
• NFC Pairing (RX Mode only): For compatible smartphones with NFC enabled, simply tap your phone near the NFC induction area on the adapter to establish a quick connection.

5.2 Dual Link Function

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

1. Connect the first Bluetooth headphone/speaker as described in TX mode.
2. Once the first device is connected, put the second Bluetooth headphone/speaker into pairing mode.
3. Press the 'Quick pairing mode' button on the adapter to connect the second device.

5.3 Volume Control and Track Navigation

Use the 'Pre/Next switch & Volume up/down' buttons to adjust volume or navigate tracks. The 'Play/Pause' button controls media playback.

5.4 Charging

Connect the Micro USB charging cable to the device's charging port and a USB power source. The device can be used while charging.

5.5 Automatic Power Saving

The device will automatically enter a dormant and power-saving mode after 6 minutes of no connection to conserve battery life.

6. Maintenance

To ensure the longevity and optimal performance of your VIKEFON Bluetooth adapter, follow these simple maintenance guidelines:

• Keep the device dry and away from moisture.
• Avoid exposing the device to extreme temperatures.
• Clean the device gently with a soft, dry cloth. Do not use harsh chemicals or abrasive cleaners.
• Store the device in a cool, dry place when not in use.

7. Troubleshooting

7.1 Pairing Issues with Sony Bluetooth Devices

Sony Bluetooth headsets/earphones/headphones use a special encoding method. When pairing with the VIKEFON adapter in transmitter mode, it may take longer to establish a connection. The pairing time varies by Sony model, but they should eventually pair successfully.

7.2 Audio-Visual Lag (Lip Sync Delay)

If you experience a slight sound delay when watching TV or movies, ensure that both the VIKEFON adapter and your Bluetooth headphones/speakers support aptX Low Latency (aptX LL) technology. For optimal performance, both the transmitting and receiving devices must support aptX LL.

7.3 Limited Transmission Range

The stated transmission range (80m/262ft outdoors, 25-35m/80-110ft indoors) is under ideal conditions. Actual operation range can be affected by:

• Obstacles such as walls, floors, and ceilings.
• Interference from other wireless devices like Wi-Fi routers and wireless TV adapters.
• The capabilities of the receiving Bluetooth device.

Try to minimize obstacles and interference sources between the adapter and your receiving device for best range.

7.4 Device Not Connecting/Pairing

• Ensure the device is in the correct mode (RX for receiving, TX for transmitting).
• Make sure both the adapter and the target Bluetooth device are in pairing mode.
• Check that the adapter is sufficiently charged.
• Restart both the adapter and the Bluetooth device you are trying to connect.
• Clear previous pairing records on your Bluetooth device and try pairing again.

8. User Tips

• Optimize Range: For the best transmission range, position the adapter in an open area, away from other wireless devices that might cause interference.
• NFC Convenience: If your phone supports NFC, use it in RX mode for quick and effortless pairing.
• AptX LL for Video: Always use Bluetooth headphones/speakers that support aptX Low Latency when watching videos to avoid noticeable audio delay.

9. Warranty and Support

The VIKEFON Bluetooth 5.0 Transmitter Receiver comes with a manufacturer's limited warranty. Please refer to the details below:

• Product Warranty: 12 months Manufacturer's limited Warranty for defective items (excluding items damaged and/or misused after receipt).
• Accessories Warranty: Accessories included with the product come with a 3-month warranty.

If you encounter any issues with your device, please contact the seller or manufacturer's support with your order number and a detailed description of the defect. Do not attempt to repair or replace items with an expired warranty without consulting support.