1. Introduction
Welcome to the STF One TWS Wireless Earbuds user manual. This guide provides detailed instructions on how to set up, operate, maintain, and troubleshoot your new earbuds. Please read this manual carefully to ensure optimal performance and longevity of your device.
The STF One TWS earbuds feature Environmental Noise Cancellation (ENC) with 4 microphones for clear calls, IPX4 water resistance, and an extended battery life of up to 42 hours with the charging case.
Image: STF One TWS Wireless Earbuds, one earbud removed from its charging case.
2. Package Contents
- STF One TWS Wireless Earbuds (Left and Right)
- Charging Case
- USB Charging Cable
- User Manual
3. Setup
3.1. Charging the Earbuds and Case
Before first use, fully charge the earbuds and the charging case.
- Place the earbuds into the charging case. Ensure they are correctly seated.
- Connect the USB charging cable to the charging port on the case and to a power source (e.g., USB wall adapter, computer USB port).
- The indicator light on the charging case will show the charging status. Refer to the LED indicator section for details.
- A full charge provides up to 7 hours of playback for the earbuds, and the case provides an additional 5 charges, totaling up to 42 hours of use.
Image: Multiple STF One TWS charging cases in different colors, illustrating the 42-hour battery life.
3.2. Bluetooth Pairing
To connect your STF One TWS earbuds to your device:
- Open the charging case. The earbuds will automatically enter pairing mode, indicated by a flashing LED light on the earbuds.
- On your device (smartphone, tablet, computer), enable Bluetooth.
- Search for "STF One TWS" in the list of available Bluetooth devices.
- Select "STF One TWS" to connect. Once connected, the LED indicator on the earbuds will stop flashing.
- The earbuds will automatically reconnect to the last paired device when removed from the case, if Bluetooth is enabled on the device.
3.3. Wearing the Earbuds
For optimal sound quality and comfort, ensure the earbuds are properly fitted in your ears.
- Identify the left (L) and right (R) earbuds.
- Gently insert each earbud into the corresponding ear canal.
- Rotate the earbud slightly until it feels secure and comfortable.
4. Operating Instructions
4.1. Power On/Off
- Power On: Open the charging case, or long-press the touch control area on both earbuds for 3 seconds if they are out of the case and off.
- Power Off: Place the earbuds back into the charging case and close the lid, or long-press the touch control area on both earbuds for 5 seconds.
4.2. Touch Controls
The STF One TWS earbuds feature intuitive touch controls on each earbud.
| Function | Action |
|---|---|
| Play/Pause | Single tap on either earbud |
| Next Track | Double tap on the right earbud |
| Previous Track | Double tap on the left earbud |
| Volume Up | Triple tap on the right earbud |
| Volume Down | Triple tap on the left earbud |
| Answer/End Call | Single tap on either earbud |
| Reject Call | Long press on either earbud for 2 seconds |
| Activate Voice Assistant | Long press on either earbud for 3 seconds |
4.3. Environmental Noise Cancellation (ENC)
The STF One TWS earbuds feature ENC technology with 4 microphones to reduce ambient noise during calls, ensuring your voice is heard clearly.
- ENC is automatically active during phone calls.
- There is no manual control to toggle ENC on/off for music listening, as its primary function is for call clarity.
Image: Black STF One TWS earbuds with a graphic indicating Environmental Noise Cancellation (ENC).
Image: Red STF One TWS earbuds with a graphic indicating 4 microphones for maximum call fidelity.
5. Maintenance
5.1. Cleaning
Regular cleaning helps maintain the performance and hygiene of your earbuds.
- Use a soft, dry, lint-free cloth to wipe the earbuds and charging case.
- For stubborn dirt, slightly dampen the cloth with water. Avoid using harsh chemicals or abrasive materials.
- Clean the charging contacts on both the earbuds and the case periodically with a dry cotton swab to ensure proper charging.
- Do not immerse the earbuds or charging case in water.
5.2. Water Resistance (IPX4)
The STF One TWS earbuds are rated IPX4, meaning they are resistant to splashing water from any direction.
- They are suitable for workouts and light rain.
- They are not designed for swimming, showering, or submersion in water.
- Ensure the earbuds are dry before placing them back into the charging case to prevent damage.
Image: White STF One TWS earbuds with a graphic indicating IPX4 splash resistance.
5.3. Storage
When not in use, store the earbuds in their charging case to protect them and keep them charged. Store in a cool, dry place away from extreme temperatures.
6. Troubleshooting
If you encounter issues with your STF One TWS earbuds, refer to the following common problems and solutions:
| Problem | Solution |
|---|---|
| Earbuds not pairing |
|
| No sound from one earbud |
|
| Charging issues |
|
| Humming or static noise (as reported by some users) |
|
7. Specifications
| Feature | Detail |
|---|---|
| Model Name | One TWS |
| Connectivity Technology | Wireless (Bluetooth) |
| Microphones | 4 (with Environmental Noise Cancellation) |
| Water Resistance Rating | IPX4 (Splash Resistant) |
| Earbud Battery Life | Up to 7 hours |
| Total Battery Life (with case) | Up to 42 hours |
| Control Method | Touch |
| Compatible Devices | Phones, Tablets, Desktops, Televisions |
| Dimensions | 18.5 x 13.2 x 4.9 cm (Package) |
| Weight | 130 g (Package) |
8. Warranty and Support
For warranty information and customer support, please refer to the documentation included with your purchase or visit the official STF website.
If you experience any issues not covered in this manual, please contact STF customer service for assistance.
Return Policy: This product is eligible for a 30-day free return. Please check Amazon's return policy for details.