Product Overview
The 1Mii SafeFly Pro is a compact and powerful Bluetooth 5.3 audio adapter that functions as both a transmitter (TX) and a receiver (RX). Equipped with a clear OLED screen, it provides real-time information on battery level, volume, paired devices, and audio codecs. Its wide compatibility and dual connection capability make it perfect for sharing audio experiences on the go or at home.

Image: The 1Mii SafeFly Pro Bluetooth 5.3 Transmitter Receiver, showcasing its compact design and integrated audio jack.
What's Included
Your 1Mii SafeFly Pro package contains the following items:
- SafeFly Pro Bluetooth Audio Adapter
- USB-C Charging Cable
- 3.5mm Female to Female Audio Adapter
- Keychain Attachment
- User Manual
Image: All components included in the 1Mii SafeFly Pro retail package, laid out clearly.
Video: An unboxing video demonstrating the contents of the 1Mii SafeFly Pro package and initial handling of the device.
Device Layout
Familiarize yourself with the buttons and ports on your SafeFly Pro:
Image: Detailed diagram of the SafeFly Pro, highlighting its audio plug protector, flexible audio cable, OLED display screen, M key, OK key, TX/RX sliding switch, one-click reset button, and USB-C charging port.
- OLED Display Screen: Shows device name, Bluetooth codec, volume level, and battery level.
- M Key: Selects connected device or switches Bluetooth decoding format.
- OK Key: Power ON/OFF (long press for 2s), confirms connected device, enters pairing mode (long press for 2s), or Play/Pause.
- TX/RX Sliding Switch: Toggles between Transmitter (TX) and Receiver (RX) modes.
- USB-C Charging Port: For charging the device.
- 3.5mm Audio Connection: For connecting to audio sources or output devices.
Setup and Pairing
Charging the Device
Before first use, fully charge the SafeFly Pro using the provided USB-C charging cable. Connect the USB-C end to the device and the USB-A end to a compatible USB power adapter (not included). A full charge takes approximately 1.5 hours and provides up to 30 hours of playtime.
Transmitter (TX) Mode Setup
Use TX mode to transmit audio from non-Bluetooth devices (e.g., airplane entertainment systems, TVs, gym equipment) to your Bluetooth headphones or speakers.
- Slide the TX/RX switch to TX.
- Plug the SafeFly Pro's 3.5mm audio jack into the audio output port of your non-Bluetooth device.
- Long press the OK button for 2 seconds to enter pairing mode. The screen will display 'Searching'.
- Put your Bluetooth headphones or speakers into pairing mode.
- The SafeFly Pro will automatically search for and connect to nearby Bluetooth devices. Once connected, the device name will appear on the OLED screen.
- To connect a second pair of headphones, press the M button to select an empty slot (A or B), then long press OK for 2 seconds to enter pairing mode for the second device.
Image: The SafeFly Pro connected to an airplane seat's audio jack, enabling wireless audio streaming to Bluetooth headphones.
Video: A demonstration of the 1Mii SafeFly Pro's functionality as a transmitter, showing connection to an airplane entertainment system and pairing with Bluetooth headphones.
Receiver (RX) Mode Setup
Use RX mode to receive audio from your Bluetooth-enabled devices (e.g., smartphone, tablet) and play it through non-Bluetooth audio systems (e.g., wired speakers, car stereo, boat systems).
- Slide the TX/RX switch to RX.
- Plug the SafeFly Pro's 3.5mm audio jack into the audio input port of your wired speaker or car stereo.
- Long press the OK button for 2 seconds to enter pairing mode. The screen will display 'Searching'.
- On your smartphone or tablet, enable Bluetooth and search for 'SafeFly Pro' in the list of available devices. Select it to connect.
- Once connected, the device name will appear on the OLED screen.
- To connect a second smartphone, press the M button to select an empty slot (A or B), then long press OK for 2 seconds to enter pairing mode for the second device.
Operating Instructions
Power On/Off
Long press the OK button for 2 seconds to power the device ON or OFF.
Switching Modes (TX/RX)
Use the physical TX/RX sliding switch on the side of the device to change between Transmitter and Receiver modes. Ensure the device is powered off before switching modes for optimal performance.
Using the M and OK Buttons
- M Button: In pairing mode, press once to select the connected device. In transmission mode, press to switch the Bluetooth decoding format (e.g., AptX LL, AptX HD, SBC).
- OK Button: Short press to Play/Pause audio. Long press for 2 seconds to enter pairing mode or power ON/OFF.
Understanding the OLED Screen
The OLED screen provides crucial information at a glance:
- Volume Level: Indicated by a numerical value (e.g., '15').
- Audio Format: Displays the active Bluetooth codec (e.g., SBC, AptX, AptX LL, AptX HD, AptX Adaptive).
- Battery Level: An icon indicates the remaining battery charge.
- Paired Devices: Shows the names of up to two connected devices (A and B).
Image: A visual representation of the SafeFly Pro operating in both Transmitter (TX) and Receiver (RX) modes, illustrating typical use cases.
Image: The SafeFly Pro enabling dual headphone connection to a television, allowing two users to enjoy audio simultaneously.
Maintenance
To ensure the longevity and optimal performance of your 1Mii SafeFly Pro, follow these maintenance guidelines:
- Keep the device clean by wiping it with a soft, dry cloth. Avoid using harsh chemicals or abrasive cleaners.
- Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
- When not in use, utilize the keychain attachment to protect the 3.5mm audio plug from damage.
- Avoid dropping the device or subjecting it to strong impacts.
Troubleshooting
If you encounter issues with your SafeFly Pro, try the following solutions:
- Device not powering on: Ensure the device is fully charged. Connect it to a power source and try again.
- Cannot pair with headphones/phone:
- Ensure the SafeFly Pro is in the correct TX or RX mode.
- Make sure both the SafeFly Pro and your target device are in pairing mode.
- Move the devices closer to each other.
- Clear previous pairing records on both devices and try pairing again.
- No sound or low volume:
- Check the volume levels on both the SafeFly Pro (via OLED screen) and the connected audio device/headphones.
- Ensure the 3.5mm audio connection is fully inserted into both the SafeFly Pro and the audio source/output.
- Verify that the correct audio input/output is selected on your external device (e.g., TV, speaker).
- Sound quality issues (e.g., static, distortion):
- Ensure there are no strong electromagnetic interferences nearby.
- Try switching the Bluetooth decoding format using the M button.
- Reduce the distance between the SafeFly Pro and the connected Bluetooth device.
Specifications
| Feature | Detail |
|---|---|
| Product Dimensions | 2.2 x 1.1 x 0.47 inches |
| Item Weight | 0.64 ounces |
| Bluetooth Version | 5.3 |
| Audio Codecs | AptX Low Latency, AptX HD, AptX Adaptive, AptX, AAC, SBC |
| Connectivity Technology | Bluetooth, AUX |
| Power Source | Battery Powered (1 Lithium Polymer battery included) |
| Battery Life | Up to 30 hours of playtime |
| Manufacturer | 1Mii |
Safety Information
Please read and follow these safety guidelines to prevent injury or damage to the device:
- Do not expose the device to extreme temperatures (hot or cold), direct sunlight, or high humidity.
- Avoid dropping, disassembling, or attempting to repair the device yourself. This will void the warranty.
- Dispose of the battery and device according to local regulations. Do not dispose of in household waste.
- Keep out of reach of children.
Warranty and Support
1Mii products are designed for reliability and performance. For any product inquiries, technical support, or warranty claims, please contact 1Mii customer service directly. Refer to the official 1Mii website or the contact information provided in your product packaging for details.
