1. Product Overview
The 1Mii B03Pro+ is a versatile Bluetooth 5.3 audio adapter designed to function as both a transmitter and a receiver. It enables high-resolution wireless audio streaming for your TV, home stereo system, and other audio devices. Featuring LDAC and aptX Low Latency support, it ensures high-fidelity sound and minimal audio delay.
Figure 1: 1Mii B03Pro+ Bluetooth Transmitter Receiver
Key Features:
- Multifunctional Bluetooth Audio Adapter: Functions as a Bluetooth receiver to stream music from mobile phones, tablets, or computers to your existing sound system. As a Bluetooth transmitter, it connects Bluetooth headphones or speakers to your TV.
- Hi-Res Audio Solution: Supports LDAC codec for wireless high-resolution audio streaming up to 24-bit/96kHz. The B03Pro+ supports both LDAC transmission and reception. This feature requires your paired device to also support LDAC or aptX HD.
- Pass-through Mode (TX Bypass): Allows simultaneous audio output to both wireless headphones and a wired soundbar/speaker. This is useful for situations where different volume levels are needed, such as for individuals with hearing impairments.
- Easy Pairing with Display Screen: Features a clear, readable display screen for easy selection of Bluetooth headphones, speakers, or mobile phones. Includes volume control buttons.
- No Lip-Sync Delay: AptX Low Latency technology minimizes audio delay, ensuring perfect synchronization for TV, movies, and videos. For optimal low latency, your receiving device should also support aptX Low Latency.
2. Package Contents
Please check the package for the following items:
- 1Mii B03Pro+ Bluetooth Transmitter Receiver
- USB Power Cable
- 3.5mm Female to RCA Male Cable
- 3.5mm Audio Cable
- Optical Cable
Figure 2: Package Contents
3. Device Layout and Controls
Familiarize yourself with the ports and controls of the 1Mii B03Pro+ for optimal use.
Figure 3: Multiple Audio Inputs and Outputs
- 3.5mm OUT: Audio output to speakers/headphones.
- Optical OUT: Digital optical audio output.
- DC IN (Type-C): Power input (5V DC).
- Optical IN: Digital optical audio input.
- 3.5mm IN: Audio input from source devices.
Figure 4: LCD Display and Control Buttons
- LCD Display: Shows current mode, connected devices, and audio codec.
- Search Button: Initiates device search for pairing.
- Volume Down / Previous Track Button: Decreases volume or navigates to the previous track.
- Volume Up / Next Track Button: Increases volume or navigates to the next track.
- OK Button: Confirms selections.
- TX/RX/Bypass Switch: Selects operating mode.
4. Safety Information
To ensure safe and proper operation of your 1Mii B03Pro+, please observe the following safety guidelines:
- Avoid exposure to extreme temperatures.
- Keep the device dry and away from liquids.
- Ensure adequate ventilation around the device.
- Avoid interference with other wireless devices.
- Do not attempt to disassemble or repair the device yourself. Refer to qualified service personnel.
- Use only the provided power cable and adapter.
5. Setup Instructions
5.1. General Connection Steps
- Connect the 1Mii B03Pro+ to a power source using the provided USB power cable.
- Select the desired operating mode (TX, RX, or Bypass) using the switch on the device.
- Connect your audio source and output devices using the appropriate cables (Optical, 3.5mm AUX, RCA).
5.2. Transmitter (TX) Mode Setup
In TX mode, the B03Pro+ transmits audio from your TV or other audio source to Bluetooth headphones or speakers.
- Set the mode switch to TX.
- Connect your TV's audio output (Optical OUT or 3.5mm AUX OUT) to the B03Pro+'s corresponding input (Optical IN or 3.5mm IN).
- Put your Bluetooth headphones/speakers into pairing mode.
- On the B03Pro+, press the Search button to scan for devices. Select your device from the LCD display and press OK to connect.
Figure 5: Transmitter Mode Connection Example
5.3. Receiver (RX) Mode Setup
In RX mode, the B03Pro+ receives audio from your Bluetooth-enabled smartphone or tablet and outputs it to your wired stereo system or speakers.
- Set the mode switch to RX.
- Connect your stereo system's audio input (Optical IN, 3.5mm AUX IN, or RCA IN) to the B03Pro+'s corresponding output (Optical OUT, 3.5mm OUT).
- Enable Bluetooth on your smartphone/tablet and search for "1Mii B03Pro+". Select it to pair.
- Once connected, audio from your device will stream to your stereo system.
Figure 6: Receiver Mode Connection Example
5.4. Bypass Mode Setup
Bypass mode allows you to output audio simultaneously to both wired speakers and wireless Bluetooth headphones when the B03Pro+ is connected to your TV.
- Set the mode switch to Bypass.
- Connect your TV's audio output (e.g., Optical OUT) to the B03Pro+'s corresponding input (Optical IN).
- Connect the B03Pro+'s output (e.g., Optical OUT or 3.5mm OUT) to your wired soundbar or stereo system.
- Pair your Bluetooth headphones as described in TX mode.
- Audio will now play through both your wired system and Bluetooth headphones.
Figure 7: Bypass Mode Connection Example
6. Operating Instructions
6.1. Power On/Off
The device powers on automatically when connected to a power source. To power off, disconnect the power cable.
6.2. Pairing Bluetooth Devices
In TX mode, press the Search button to find available Bluetooth devices. Use the Up/Down buttons to navigate the list on the LCD screen and press OK to select and pair. In RX mode, the device is discoverable as "1Mii B03Pro+" on your smartphone/tablet's Bluetooth settings.
6.3. Switching Modes
Use the physical TX/RX/Bypass switch on the side of the device to change between Transmitter, Receiver, and Bypass modes.
6.4. Volume Control
Use the Volume Up (^) and Volume Down (v) buttons on the device to adjust the audio output volume. These buttons can also be used to navigate tracks in RX mode (long press).
Figure 8: Volume Control and Track Navigation
6.5. LDAC, aptX HD, and aptX Low Latency
The B03Pro+ automatically uses the highest quality audio codec supported by both the device and the connected Bluetooth headphones/speakers. The active codec (LDAC, aptX HD, aptX LL, SBC) will be displayed on the LCD screen.
Figure 9: LDAC High-Resolution Audio
6.6. Dual Connection
The B03Pro+ supports connecting to two Bluetooth headphones/speakers simultaneously in TX mode. Follow the pairing steps for the first device, then repeat for the second device. Note that connecting two devices may default to a lower quality codec like SBC.
Figure 10: Dual Connection Feature
6.7. Auto Reconnect
The B03Pro+ will automatically attempt to reconnect to previously paired devices when powered on and within range.
Figure 11: Auto Reconnect Functionality
7. Maintenance
To ensure the longevity and optimal performance of your 1Mii B03Pro+:
- 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 dropping or subjecting the device to strong impacts.
- Keep the device away from strong magnetic fields.
8. Troubleshooting
If you encounter issues with your 1Mii B03Pro+, please refer to the following common solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cable not connected or faulty. | Ensure the USB power cable is securely connected to both the device and a working power source. Try a different USB port or adapter. |
| Cannot pair Bluetooth device | Device not in pairing mode; too far apart; interference. | Ensure the B03Pro+ is in the correct mode (TX for transmitting, RX for receiving). Put your headphones/speakers/phone into pairing mode. Place devices closer together. Restart both devices. |
| No audio output/input | Incorrect cable connection; wrong input/output selected; source device issue. | Verify all audio cables (Optical, 3.5mm, RCA) are correctly connected to the appropriate IN/OUT ports. Check the audio settings on your source device (TV, phone) to ensure output is directed to the B03Pro+. |
| Audio delay (lip-sync issue) | aptX Low Latency not active; receiving device does not support aptX LL. | Ensure both the B03Pro+ and your receiving Bluetooth device support aptX Low Latency. If not, some delay may be unavoidable. |
| Poor audio quality or crackling | Interference; distance; low-quality codec. | Reduce distance between devices. Remove obstacles. Avoid strong Wi-Fi signals or other wireless devices. Check the codec displayed on the LCD; if it's SBC, try re-pairing or using a device that supports LDAC/aptX HD. |
| Bypass mode not working | Incorrect cable connections for bypass. | Ensure that the input and output connections for bypass are correctly matched (e.g., Optical IN to Optical OUT, or 3.5mm IN to 3.5mm OUT). |
9. Specifications
| Feature | Specification |
|---|---|
| Model Name | B03Pro+ |
| Brand | 1Mii |
| Connectivity Technology | Aux, Bluetooth |
| Wireless Communication Standard | Bluetooth 5.3 |
| Supported Standards | Bluetooth 5.3, LDAC, aptX Low Latency, aptX HD, aptX, SBC |
| Compatible Devices | Smartphone, Television, Bluetooth-enabled devices |
| Audio Input | Optical, 3.5mm AUX, RCA |
| Audio Output | Optical, 3.5mm AUX |
| Audio Output Mode | Stereo (2 Channels) |
| Power Source | Electric Cable (5 Volts DC) |
| Rechargeable Batteries Included | No |
| Material | Plastic |
| Color | Black |
| Special Feature | Electronic Display |
| Control Method | Manual Control (Tactile Buttons) |
| Remote Control Included | No |
10. Warranty and Support
10.1. Warranty Information
The 1Mii B03Pro+ comes with a 1-year warranty from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal use. It does not cover damage caused by misuse, accidents, unauthorized modifications, or natural disasters.
10.2. Customer Support
For technical support, warranty claims, or any questions regarding your 1Mii B03Pro+, please contact 1Mii customer service. Refer to the contact information provided with your product packaging or visit the official 1Mii website for assistance.
Please retain your proof of purchase for warranty service.
