Introduction
Thank you for choosing the OneOdio F4 Retro Wireless On-Ear Headphones. This manual provides detailed instructions to help you set up, operate, and maintain your headphones for optimal performance. The F4 headphones combine a retro design with modern audio technology, offering a comfortable listening experience with high-resolution audio capabilities and versatile connectivity.

Image Description: A close-up view of the OneOdio F4 Retro Wireless On-Ear Headphones in white. The image highlights the textured earcups, the adjustable headband, and the metallic accents, showcasing the product's vintage-inspired aesthetic.
Setup
1. Charging the Headphones
Before first use, fully charge your headphones. Connect the included USB-C charging cable to the charging port on the headphone and a compatible USB power source. The LED indicator will show charging status and turn off or change color when fully charged. A full charge takes approximately 1.5 hours and provides up to 50 hours of playtime.

Image Description: The OneOdio F4 headphones are shown resting on a wooden surface next to a newspaper, emphasizing their extended 50-hour battery life, which is indicated by a graphic overlay.
2. Powering On/Off
- To Power On: Press and hold the Power button for approximately 3 seconds until the LED indicator lights up.
- To Power Off: Press and hold the Power button for approximately 3 seconds until the LED indicator turns off.
3. Bluetooth Pairing
- Ensure the headphones are powered off.
- Press and hold the Power button for 5-7 seconds until the LED indicator flashes red and blue alternately, indicating pairing mode.
- On your device (smartphone, tablet, computer), enable Bluetooth and search for available devices.
- Select "OneOdio F4" from the list of devices.
- Once connected, the LED indicator will flash blue slowly.
4. Dual Device Pairing
The OneOdio F4 supports connecting to two Bluetooth devices simultaneously. This allows you to seamlessly switch between audio sources, for example, listening to music on your laptop and taking calls on your phone.
- Pair the headphones with the first device as described above.
- Disable Bluetooth on the first device. The headphones will re-enter pairing mode.
- Pair the headphones with the second device.
- Re-enable Bluetooth on the first device. The headphones should automatically connect to both devices.

Image Description: The OneOdio F4 headphones are centrally placed between a tablet playing music and a smartphone receiving a call, visually representing the dual device pairing capability.
5. Wired Connection
For a wired connection, use the included 3.5mm audio cable. Plug one end into the 3.5mm audio jack on the headphones and the other end into your audio source. The wired connection works even if the headphones are powered off or out of battery.

Image Description: A detailed view of the right earcup of the OneOdio F4 headphones, highlighting the 3.5mm audio jack, the power button, and the multi-function button, illustrating the wired connectivity option.
Operating Instructions
1. Button Controls
The OneOdio F4 headphones feature intuitive button controls located on the right earcup:
- Power Button: Press and hold for 3 seconds to power on/off.
- Multi-function Button (Center Dial):
- Press once: Play/Pause music, Answer/End call.
- Press twice: Next track.
- Press three times: Previous track.
- Press and hold: Reject incoming call.
- Volume Up/Down: Rotate the center dial clockwise to increase volume, counter-clockwise to decrease volume.
2. Making and Receiving Calls
The built-in microphone allows for hands-free calling:
- Answer a Call: Press the Multi-function button once.
- End a Call: Press the Multi-function button once during a call.
- Reject a Call: Press and hold the Multi-function button for 2 seconds.
Maintenance
1. Cleaning
- Use a soft, dry cloth to clean the surface of the headphones.
- Do not use liquid cleaners or sprays directly on the headphones.
- Gently wipe the ear cushions with a slightly damp cloth if necessary, then dry thoroughly.
2. Storage
- Store the headphones in a cool, dry place away from direct sunlight and extreme temperatures.
- Avoid placing heavy objects on the headphones.
- When not in use for extended periods, charge the headphones periodically to maintain battery health.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Headphones do not power on. | Low battery. | Charge the headphones fully. |
| Cannot pair with device. | Headphones not in pairing mode; Bluetooth disabled on device. | Ensure headphones are in pairing mode (flashing red/blue). Enable Bluetooth on your device. Forget previous pairings and try again. |
| No sound or low volume. | Volume too low; incorrect audio source; headphones not connected. | Increase headphone and device volume. Check Bluetooth connection or 3.5mm cable. Ensure correct audio output is selected on your device. |
| Poor audio quality. | Interference; device too far; low battery. | Move closer to your device. Avoid strong Wi-Fi or other Bluetooth signals. Charge headphones. |
Specifications

Image Description: The OneOdio F4 headphones are displayed with a prominent 'Hi-Res Audio Certified' badge, highlighting their capability to deliver rich, immersive sound through 30mm dynamic drivers.
| Feature | Detail |
|---|---|
| Model Name | F4 |
| Connectivity Technology | Wired, Wireless (Bluetooth 5.4) |
| Audio Driver Size | 30 mm |
| Frequency Range | 20 Hz - 40 KHz |
| Sensitivity | 116 dB |
| Impedance | 32 Ohm |
| Battery Life | Up to 50 Hours |
| Charging Time | 1.5 Hours |
| Headphones Jack | 3.5 mm Jack |
| Weight | 0.25 lb (approx. 9.6 ounces) |
| Material | Leather, Metal, Plastic |
| Noise Control | Sound Isolation |
Warranty and Support
OneOdio products are designed for reliability and performance. For warranty information, technical support, or any inquiries regarding your OneOdio F4 headphones, please refer to the official OneOdio website or contact their customer service directly. Keep your purchase receipt for warranty claims.





