1. Introduction
Thank you for choosing the VIKEFON Bluetooth 5.3 Audio Receiver Transmitter (Model: OMS-M13). This device is a versatile 2-in-1 solution, functioning as both a Bluetooth receiver and a transmitter. It allows you to upgrade wired audio devices to wireless Bluetooth capabilities, supporting various audio interfaces including 3.5mm AUX, RCA, Optical, Coaxial, and USB. With Bluetooth 5.3 technology, NFC pairing, and a built-in DAC converter, it delivers stable, high-quality audio for your TV, PC, car speakers, and more.
Image 1.1: VIKEFON Bluetooth 5.3 Audio Receiver Transmitter
2. Safety Information
- Keep the device away from water, moisture, and extreme temperatures.
- Do not attempt to disassemble, repair, or modify the device yourself. This may void the warranty and cause damage.
- Use only the provided charging cable and a compatible 5V/1A power adapter.
- Avoid dropping or subjecting the device to strong impacts.
- Ensure proper ventilation when operating the device.
3. Package Contents
Please check the box for the following items:
- Bluetooth adapter host x1
- Type-C charging cable x1
- 3.5mm audio cable x1
- Red and white RCA lotus thread x1
4. Product Overview
The VIKEFON OMS-M13 features a sleek design with an LED digital display and intuitive controls. It supports both Bluetooth reception (RX) and transmission (TX) modes, allowing for seamless integration with various audio systems.
4.1 Key Features
- Bluetooth 5.3 Chip: Ensures stronger compatibility, stability, and lower power consumption.
- 2-in-1 Functionality: Easily switch between Bluetooth Receiver (RX) and Transmitter (TX) modes.
- NFC Sensing: Tap your NFC-enabled phone to connect/disconnect instantly.
- Multiple Audio Interfaces: Supports 3.5mm AUX, RCA, Optical, Coaxial, and USB for broad compatibility.
- High-Definition LED Digital Display: Clearly shows working status and Bluetooth mode.
- RGB Phantom Color Lights: Adjustable lighting modes for an enhanced visual experience.
- Built-in 1000mAh Battery: Provides up to 10-12 hours of continuous listening.
- USB Playback: Play various lossless audio files directly from a USB disk.
- Built-in Microphone: Supports hands-free calling and navigation in RX mode.
4.2 Device Layout and Interfaces
Image 4.1: Device Interfaces (Front View)
Image 4.2: Device Controls and Indicators (Top View)
- Mode Switch: Toggle between RX (Receiver) and TX (Transmitter) modes.
- Status Indicators: LEDs for RX, TX, USB, LINE, COA, OPT modes.
- Keypad Area: Buttons for playback control, volume, and RGB light adjustment.
- Phantom Light Digital Display: Shows current status and Bluetooth mode.
- AUX Interface: 3.5mm audio input/output.
- RCA Interfaces: Red and white audio input/output.
- Coaxial Interface: Digital audio input.
- Optical Interface: Digital audio input.
- USB Interface: For USB disk playback.
- DC 5V (Type-C) Port: For charging the device.
5. Setup Guide
5.1 Charging the Device
- Connect the provided Type-C charging cable to the DC 5V port on the device.
- Connect the other end of the cable to a 5V/1A USB power adapter (not included) or a computer USB port.
- The device will fully charge in approximately 1.5 hours. A full charge provides about 10-12 hours of continuous use.
Image 5.1: Battery Life and Charging
5.2 NFC Pairing (Receiver Mode)
For quick and hassle-free connection with NFC-enabled smartphones:
- Ensure the device is in Receiver (RX) mode.
- Enable NFC on your smartphone.
- Tap your phone close to the NFC sensor area on the device.
- Your phone will automatically connect or disconnect from the device.
Image 5.2: NFC Pairing
5.3 Connecting in Receiver (RX) Mode
Use RX mode to receive Bluetooth audio from your phone, tablet, or other Bluetooth-enabled device and output it to wired speakers, amplifiers, or car stereos.
- Set the mode switch on the device to RX.
- Connect the device to your active speakers, amplifier, or car stereo using the appropriate audio cable (3.5mm AUX or RCA).
- On your phone or tablet, search for Bluetooth devices and select "OMS-M13" to pair.
- Once connected, audio from your phone will play through the connected speakers.
- The device supports connecting two cell phones simultaneously in RX mode. Pair the first phone, then pair the second. The device will intelligently switch between them.
Image 5.3: Receiver Mode (RX) Connection Diagram
5.4 Connecting in Transmitter (TX) Mode
Use TX mode to transmit audio from non-Bluetooth devices like TVs, PCs, or projectors to Bluetooth headphones or speakers.
- Set the mode switch on the device to TX.
- Connect the device to your TV, PC, laptop, decoder, or projector using the appropriate audio cable (3.5mm AUX, RCA, Coaxial, or Optical).
- Put your Bluetooth headphones or speaker into pairing mode.
- The OMS-M13 will automatically search for nearby Bluetooth devices and connect to them.
- Once connected, audio from your source device will play through your Bluetooth headphones/speaker.
Image 5.4: Transmitter Mode (TX) Connection Diagram
5.5 USB Disk Playback
The device supports playing lossless audio files directly from a USB disk.
- Insert a USB disk containing supported audio files (MP3/WAV/WMA/APE/FLAC/M4A/ALAC/AMR) into the USB port on the device.
- The device will automatically detect and begin playing audio from the USB disk.
- Use the keypad controls to manage playback (play/pause, next/previous track).
Image 5.5: USB Flash Drive Function
6. Operating Instructions
6.1 Mode Switching
Use the physical switch on the side of the device to toggle between Receiver (RX) and Transmitter (TX) modes. The LED display will indicate the current mode.
6.2 RGB Lighting Modes
The device features cool RGB phantom color lights with three distinct modes:
- Diffusion Pattern: Lights flow from the center to the sides.
- Shrinkage Mode: Lights flow from the sides to the center.
- Phantom Mode: Rhythmic flow of lights, includes 6 color modes (cyan, greener, red, soft green, violet, yellow).
Use the dedicated button on the keypad area to cycle through the RGB lighting modes and adjust colors.
Image 6.1: RGB Colorful Lamp Modes
6.3 Digital Display
The high-definition LED digital display provides real-time information about the device's status, including:
- Power on/off status (HIFI ON/OFF).
- Playing time/song playback progress.
- Reception mode (BLUE for speakers/amplifiers).
- Transmit mode (LINE for TV/PC upgrades).
6.4 Hands-Free Calling
In Receiver (RX) mode, with your smartphone connected, the built-in microphone allows you to answer calls hands-free. Use the control buttons on the device to manage calls.
7. Specifications
| Feature | Specification |
|---|---|
| Product Model | OMS-M13 |
| Bluetooth Version | Bluetooth V5.3 |
| Supported Protocols (RX) | A2DP, AVRC |
| Supported Protocols (TX) | A2DP |
| Working Frequency Range | 2.402GHz - 2.480GHz |
| Sensitivity | -85dBm < 0.1% BER |
| Signal to Noise Ratio | ≥ 90dB |
| Distortion | ≤ 0.1% |
| Input Interfaces | 3.5mm AUX, RCA, Optical, Coaxial, USB |
| Output Interfaces | 3.5mm AUX, RCA |
| Fiber Optic Parameters | Supports 32/44.1/48/96/192KHz sampling rate, 24 bits |
| Supported Audio Formats | MP3/WAV/WMA/APE/FLAC/M4A/ALAC/AMR |
| Screen Size | 25 x 10mm LED |
| Working Current | < 40mA |
| Built-in Battery | 3.7V/1000mAh (3.7W) |
| Charging Current | Approximately 1000mA |
| Charging Time | Approximately 1.5 hours |
| Battery Life (RX) | Approximately 10 hours |
| Battery Life (TX) | Approximately 10-12 hours |
| Bluetooth Distance | 10-20M (without obstacles) |
| Charging Method | Type-C 5V/1000mA |
| Wireless Type | Bluetooth |
| Sound Track | Double |
| Content | AUDIO |
| Certification | CE, FCC, RoHS |
8. Troubleshooting
- Device won't turn on: Ensure the device is fully charged. Connect it to a power source using the Type-C cable.
- Cannot pair with a Bluetooth device:
- Ensure the OMS-M13 is in the correct mode (RX for receiving, TX for transmitting).
- Make sure the target Bluetooth device (phone, headphones, speaker) is in pairing mode.
- Check that the devices are within the 10-20 meter Bluetooth range.
- Clear previous Bluetooth connections on both devices and try pairing again.
- No sound output/input:
- Verify all audio cables are securely connected to the correct input/output ports on both the OMS-M13 and your audio equipment.
- Check the volume levels on both the OMS-M13 and the connected audio devices.
- Ensure the correct input source is selected on your amplifier or speakers.
- If using Optical/Coaxial, ensure the source device is outputting digital audio.
- Can I connect two Bluetooth headphones in TX mode?
- No, the OMS-M13 supports connecting to one Bluetooth headphone or speaker at a time in Transmitter (TX) mode. The 'Intelligent One-Two' feature is for connecting two mobile phones in Receiver (RX) mode.
9. Maintenance
- Clean the device with a soft, dry cloth. Do not use liquid cleaners or aerosols.
- Store the device in a cool, dry place when not in use.
- Avoid exposing the device to direct sunlight or heat sources for extended periods.
10. User Tips
- For the fastest connection, utilize the NFC pairing feature with compatible smartphones.
- Take advantage of the dual phone connection in RX mode to easily switch between music sources without re-pairing.
- If experiencing any audio lag or instability, ensure the device is within optimal range (10-20 meters) and there are no major obstructions.
11. Warranty and Support
For warranty information or technical support, please refer to the seller's policies or contact the manufacturer directly. Keep your purchase receipt as proof of purchase.
