Introduction
The Jaybird X4 are versatile Bluetooth wireless sport headphones designed for runners and outdoor athletes. They offer a comfortable, rugged, and fully waterproof design, making them suitable for various activities and weather conditions.
What's in the Box
Your Jaybird X4 package includes the following components:
- Jaybird X4 Earbuds
- Charging Cradle
- Silicone Eargels (various sizes)
- Comply Foam Tips (various sizes)
- Speed Cinch
- Carry Pouch
- Shirt Clip

Image: All components included with the Jaybird X4 headphones, laid out clearly. This includes the earbuds, charging cradle, various sizes of silicone eargels and Comply foam tips, a speed cinch for cable management, a shirt clip, and a carry pouch.
Setup and Initial Use
1. Charging Your Headphones
Before first use, fully charge your Jaybird X4 headphones. Connect the charging cradle to a USB power source. Place the headphones onto the cradle, ensuring the charging pins align. A full charge takes approximately 2 hours and provides up to 8 hours of playtime.

Image: The Jaybird X4 wireless headphones, showing the inline remote and the charging connection point on the remote, ready to be placed into the charging cradle.
2. Achieving a Comfortable Fit (Sport-Fit Plus)
The Jaybird X4 offers a versatile Sport-Fit Plus design, allowing you to wear the headphones over your ears for a secure fit during intense activities or under your ears for more relaxed situations. Experiment with the included silicone eargels and Comply foam tips to find the best seal and comfort for your ears. The Comply Ultra thermo-reactive tips conform to individual ear canals for enhanced durability and sound.

Image: A person wearing the Jaybird X4 headphones with the cable routed over the ears, demonstrating the secure 'Sport Fit Plus' configuration ideal for active use.
3. Bluetooth Pairing
- Ensure your headphones are charged.
- Turn on your headphones by pressing and holding the power button on the inline remote until you hear a voice prompt.
- On your device (smartphone, tablet, etc.), go to the Bluetooth settings.
- Select "Jaybird X4" from the list of available devices to pair.
- Once paired, you will hear a confirmation tone.
Operating Your Headphones
Inline Remote Controls
The inline remote allows you to manage music playback, calls, and volume without needing to access your connected device.
- Power On/Off: Press and hold the center button.
- Play/Pause: Press the center button once.
- Next Track: Double-press the '+' button.
- Previous Track: Double-press the '-' button.
- Volume Up: Press the '+' button.
- Volume Down: Press the '-' button.
- Answer/End Call: Press the center button once during an incoming call.
- Reject Call: Press and hold the center button during an incoming call.

Image: A person interacting with the Jaybird X4 headphones, illustrating their use for both music listening and managing phone calls during activity.
Jaybird App and Custom EQ
Enhance your audio experience by downloading the Jaybird app. The app allows you to customize the sound EQ and save personal settings directly to your headphones. This feature provides premium sound tailored to your preferences.

Image: A smartphone screen displaying the Jaybird app's custom equalizer interface, alongside the Jaybird X4 headphones, demonstrating the ability to personalize sound profiles.
Care and Maintenance
The Jaybird X4 headphones are designed to be durable and waterproof (IPX7), but proper care will extend their lifespan.
- Cleaning: After workouts or exposure to sweat/water, gently wipe the headphones with a damp cloth. Ensure the charging contacts are clean and dry before charging.
- Water Exposure: While waterproof, avoid prolonged submersion. Always ensure the charging port is dry before connecting the charging cradle.
- Storage: Store your headphones in the provided carry pouch when not in use to protect them from dust and damage.
- Temperature: Avoid exposing the headphones to extreme temperatures (hot or cold).

Image: A person splashing water on their face while wearing the Jaybird X4 headphones, highlighting their sweatproof and waterproof (IPX7) capabilities for use in challenging conditions.
Troubleshooting
| Issue | Possible Solution |
|---|---|
| Headphones not turning on. | Ensure the headphones are fully charged. Connect to the charging cradle and allow at least 15 minutes of charge before attempting to power on. |
| Cannot pair with device. |
|
| Poor sound quality or skipping. |
|
| Battery drains quickly. |
|
Specifications
| Feature | Detail |
|---|---|
| Model Name | Jaybird X4 Wireless Sports Headphones (STORM METALLIC/GLACIER) |
| Model Number | 985-000809 |
| Connectivity | Bluetooth 4.1 |
| Wireless Range | Up to 10 meters (33 feet) |
| Battery Life | Up to 8 hours |
| Charging Time | Approximately 2 hours |
| Water Resistance | IPX7 (Sweatproof & Waterproof) |
| Frequency Response | 20 Hz - 20,000 Hz |
| Weight | 1.12 ounces (31.75 grams) |
| Manufacturer | Logitech |
Warranty and Support
For detailed warranty information and customer support, please visit the official Jaybird website or contact their customer service. Keep your proof of purchase for warranty claims.
Online Support: www.jaybirdsport.com/en-us/support.html