Introduction
Thank you for purchasing the XO F90T True Wireless Stereo Earbuds. This manual provides detailed instructions on how to set up, operate, and maintain your new earbuds. Please read this manual carefully before use to ensure optimal performance and longevity of your device.
Safety Information
- Do not expose the earbuds or charging case to extreme temperatures, humidity, or liquids.
- Avoid dropping, impacting, or disassembling the device.
- Keep out of reach of children and pets.
- Use only the provided charging cable or a certified equivalent.
- Prolonged listening at high volumes may cause hearing damage. Adjust volume to a safe level.
Package Contents
Please check the box for the following items:
- XO F90T True Wireless Stereo Earbuds (Left and Right)
- Charging Case
- Charging Cable
- User Manual
Product Overview

Image showing the XO F90T True Wireless Stereo Earbuds, one earbud removed from its charging case, and the product packaging. The earbuds are white, with a design typical of in-ear headphones, and the charging case is also white with a flip-open lid.
The XO F90T earbuds are designed for comfortable in-ear wear, providing true wireless stereo audio. The compact charging case not only protects the earbuds but also recharges them on the go. Each earbud features a speaker, microphone, and touch-sensitive area for controls. The charging case has a charging port and an indicator light.
Setup
1. Charging the Earbuds and Case
Before first use, fully charge the earbuds and the charging case. Place the earbuds into the charging case. Connect the charging cable to the case's charging port and the other end to a USB power source. The indicator light on the case will show charging status and turn off or change color when fully charged. It takes approximately 1-2 hours for a full charge.
2. Pairing with Your Device
- Ensure the earbuds are charged.
- Open the charging case. The earbuds will automatically enter pairing mode, indicated by a flashing light on one or both earbuds.
- On your device (smartphone, tablet, etc.), go to Bluetooth settings and turn Bluetooth on.
- Search for available devices. You should see "XO F90T" or a similar name in the list.
- Select "XO F90T" to connect. Once connected, the earbud indicator lights will stop flashing.
- If pairing fails, place the earbuds back into the case, close the lid, wait a few seconds, and then repeat the steps.
Operating
Wearing the Earbuds
Gently insert each earbud into your ear canal. Rotate them slightly to find a comfortable and secure fit. A proper fit ensures optimal sound quality and noise isolation.
Basic Controls (Touch Sensitive)
| 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 |
| Answer/End Call | Single tap on either earbud during an incoming call |
| Reject Call | Press and hold either earbud for 2 seconds during an incoming call |
| Activate Voice Assistant | Triple tap on either earbud |
Maintenance
Cleaning
Regularly clean your earbuds and charging case to ensure optimal performance and hygiene. Use a soft, dry, lint-free cloth to wipe the surfaces. For stubborn dirt, slightly dampen the cloth with water. Do not use harsh chemicals or abrasive materials. Ensure the charging contacts on both the earbuds and the case are clean and free of debris.
Storage
When not in use, store the earbuds in their charging case to protect them from dust, dirt, and physical damage. Store the case and earbuds in a cool, dry place, away from direct sunlight and extreme temperatures.
Troubleshooting
| Problem | Possible Solution |
|---|---|
| Earbuds not pairing with device | Ensure earbuds are charged. Turn off and on Bluetooth on your device. Forget "XO F90T" from your device's Bluetooth list and try pairing again. Place earbuds back in case, close, and reopen. |
| Only one earbud working | Ensure both earbuds are charged. Place both earbuds back in the case, close the lid, wait 5 seconds, then open again. They should re-sync automatically. |
| No sound | Check device volume. Ensure earbuds are connected. Try playing different audio. |
| Charging case not charging | Check charging cable and power source. Ensure charging port is clean. |
Specifications
| Feature | Detail |
|---|---|
| Brand Name | XO |
| Item Model Number | XO F90T |
| Connectivity Technology | Wireless |
| Wireless Communication Technology | Bluetooth |
| Headphones Form Factor | In Ear |
| Headphones Ear Placement | In Ear |
| Color | red |
| Material | Plastic |
| Batteries | 1 AA batteries required. (included) |
| Package Dimensions | 19 x 9.4 x 2.7 cm; 90 g |
Warranty and Support
The XO F90T True Wireless Stereo Earbuds come with a standard manufacturer's warranty. Please refer to the warranty card included in your package for specific terms and conditions. For technical support, troubleshooting assistance, or warranty claims, please contact your retailer or the official XO customer service. Contact information can typically be found on the product packaging or the brand's official website.