Introduction
Thank you for choosing the RTUSIA Small Bluetooth Headphones. Designed for active lifestyles, these wireless headphones offer crystal-clear sound, a built-in microphone, and a comfortable, foldable design. This manual provides essential information to help you set up, operate, and maintain your new headset, ensuring a seamless audio experience.

Image: The RTUSIA Small Bluetooth Headphones, showcasing their compact and over-ear design in blue.
Key Features
- Ergonomic Over-Ear Design: Rests outside the ear canal, providing comfort and stability, especially during physical activity. Ideal for users who find traditional earbuds uncomfortable.
- Lightweight & Compact: Extremely light, making them unnoticeable during runs or workouts. The foldable design allows for easy storage in a pocket or purse.
- Intuitive Controls: Features 4 control buttons on the right earphone for easy management of calls, volume adjustment, and music track navigation. Tactile raised dots on buttons aid in navigation.
- Extended Battery Life: Provides up to 12 hours of continuous music and calls on a single charge, ensuring long-lasting performance for daily use.
- Sweat and Water Resistant: Designed to withstand sweat and light water exposure, making them suitable for sports and outdoor activities.
- Bone Conduction Technology: Transmits sound through your cheekbones, allowing you to hear your audio while remaining aware of your surroundings.
- Bluetooth 4.2 Connectivity: Ensures stable and reliable wireless connection with all Bluetooth-enabled devices.

Image: Illustrates the "Ultra Comfort" design, showing how the headphones sit outside the ear, contrasting with typical in-ear earbuds that can cause discomfort.

Image: Demonstrates the "Wearable Around the Neck" feature, highlighting the flexibility and portability of the headphones when not in use.

Image: Shows a user enjoying music while exercising, emphasizing the "Ensure Healthy Exercise" benefit by allowing ears to breathe.

Image: A visual representation of Bluetooth 4.2 compatibility, indicating that the headphones work with a wide range of Bluetooth-enabled devices including phones, tablets, and computers.

Image: Highlights the "Sweatproof" feature, showing water droplets on the headphones, making them ideal for sports and active use.
Setup Guide
1. Charging the Headphones
Before first use, fully charge your RTUSIA headphones. A USB-C charging cable is included. Locate the USB-C port on the earphone (typically on the right side, covered by a small flap) and connect it to a power source (e.g., computer USB port, wall adapter). The indicator light will show charging status and turn off when fully charged.
2. Bluetooth Pairing
- Ensure the headphones are turned off.
- Press and hold the multi-function button (usually the center button with a phone icon) until the indicator light flashes blue and red alternately, indicating pairing mode.
- On your device (smartphone, tablet, computer), enable Bluetooth and search for available devices.
- Select "RTUSIA" or "Marathon" from the list of found devices.
- Once connected, the indicator light on the headphones will typically show a solid blue light or flash blue slowly.
- If prompted for a password, enter "0000".
Operating Instructions
Wearing the Headphones
Place the headphones over your ears with the band wrapping around the back of your head. Adjust the ear hooks to ensure a secure and comfortable fit. The design allows for stability during movement and can be worn with glasses or under a hat.
Control Buttons (Right Earphone)
- Multi-function Button (Center):
- Press once to Play/Pause music.
- Press once to Answer/End calls.
- Press and hold to Power On/Off.
- Press and hold during an incoming call to Reject call.
- Volume Up (+) Button:
- Press once to increase volume.
- Press and hold to skip to the next track.
- Volume Down (-) Button:
- Press once to decrease volume.
- Press and hold to go to the previous track.
Maintenance
- Cleaning: Wipe the headphones with a soft, dry cloth. For sweat or light dirt, a slightly damp cloth can be used, but ensure the charging port cover is securely closed. Do not use harsh chemicals or abrasive materials.
- Storage: When not in use, fold the headphones to their compact size and store them in a clean, dry place away from extreme temperatures.
- Battery Care: To prolong battery life, avoid fully discharging the headphones frequently. Charge them regularly, even if not used for extended periods.
- Water Resistance: While sweat and water resistant, these headphones are not designed for submersion. Avoid exposing them to heavy rain or swimming.
Troubleshooting
| Problem | Possible Solution |
|---|---|
| Headphones won't turn on. | Ensure the headphones are fully charged. Connect to a power source and check the charging indicator. |
| Cannot pair with device. |
|
| No sound or low volume. |
|
| Poor call quality. |
|
Specifications
| Feature | Detail |
|---|---|
| Brand | RTUSIA |
| Model Name | marathon (r-blue) |
| Connectivity Technology | Wireless (Bluetooth 4.2) |
| Ear Placement | Over Ear |
| Form Factor | Over Ear |
| Battery Life | 12 Hours (continuous music/calls) |
| Charging Time | (Not explicitly stated, but implied by 12-hour battery life) |
| Control Type | Media Control (Buttons) |
| Item Weight | 0.1 Kilograms (3.52 ounces) |
| Frequency Range | 20Hz - 20,000Hz |
| Included Components | mp3 (likely refers to the headphones themselves, or a basic cable) |
| Power Source | 1 Lithium Polymer battery (included) |
| Special Features | Sweatproof, Foldable, Built-in Microphone |
Official Product Videos
No official product videos from the seller were available for embedding in this manual based on the provided data.
Warranty and Support
Specific warranty details and direct support contact information are not provided in the available product data. Please refer to the product packaging or the retailer's website for warranty claims and customer support inquiries.





