STF ST-E12476

STF Sport One Pro Wireless Open-Ear Headphones Instruction Manual

1. Introduction

Thank you for choosing the STF Sport One Pro Wireless Open-Ear Headphones. These headphones are designed to provide a comfortable and immersive audio experience while keeping you aware of your surroundings. Featuring IPX5 water resistance, a long-lasting battery, and an ergonomic hook design, they are ideal for sports and daily use. Please read this manual carefully before using the product to ensure proper operation and to maximize your listening experience.

2. What's in the Box

  • STF Sport One Pro Wireless Open-Ear Headphones (Left and Right)
  • Charging Case
  • USB-C Charging Cable
  • User Manual

3. Product Overview

The STF Sport One Pro headphones feature an open-ear design for comfort and situational awareness, along with an ergonomic hook for a secure fit during activities. The charging case provides additional battery life and protects your headphones.

STF Sport One Pro Open-Ear Headphones
Figure 1: STF Sport One Pro Open-Ear Headphones. These headphones feature an open-ear design and an ergonomic hook for a secure and comfortable fit.
Person wearing STF Sport One Pro Headphones
Figure 2: A person wearing the STF Sport One Pro headphones, demonstrating their secure fit around the ear, ideal for active use.
Diagram of OWS technology and ergonomic hook design
Figure 3: Diagram illustrating the Open Wireless Stereo (OWS) technology and the ergonomic hook design, which ensures comfort without blocking the ear canal.
STF Sport One Pro Charging Case
Figure 4: The STF Sport One Pro charging case with the earbuds inside, ready for charging or storage.

4. Setup

4.1 Charging the Headphones and Case

Before first use, fully charge the headphones and charging case. Use the provided USB-C cable to connect the charging case to a power source. The LED indicator on the case will show the charging status.

  • Charging Time: Approximately 7 hours for a full charge.
  • Battery Life: Up to 7 hours of continuous playback, with an additional 2 charges from the case, totaling up to 22 hours.

4.2 Pairing with Your Device

  1. Open the charging case. The headphones will automatically power on and enter pairing mode.
  2. On your device (smartphone, tablet, etc.), enable Bluetooth.
  3. Search for "STF Sport One Pro" in the list of available Bluetooth devices and select it to connect.
  4. Once connected, you will hear an audio prompt, and the LED indicator on the headphones will change.

5. Operating Instructions

The STF Sport One Pro headphones feature intuitive touch controls for easy management of your audio and calls.

5.1 Basic Controls

ActionLeft EarbudRight Earbud
Play/PauseDouble tap either earbud
Volume UpN/ASingle tap
Volume DownSingle tapN/A
Next TrackN/APress and hold for 1.5s
Previous TrackPress and hold for 1.5sN/A
Answer/End CallDouble tap either earbud
Reject CallPress and hold either earbud for 1.5s
Activate Voice AssistantTriple tap either earbud

5.2 Special Features

  • OWS (Open Wireless Stereo) Technology: Enjoy open audio that allows you to hear your surroundings while listening to music, enhancing safety during outdoor activities.
  • IPX5 Water Resistance: These headphones are resistant to splashes and water jets, making them perfect for workouts and outdoor use.
  • LED Lights: Integrated LED lights provide battery status indication.
IPX5 Water Resistance and 22-hour battery life
Figure 5: Visual representation of IPX5 water resistance and the impressive 22-hour total battery life (7 hours playback + 2 case charges).
Person adjusting STF Sport One Pro headphone
Figure 6: A user adjusting the STF Sport One Pro headphone, highlighting the comfortable and customizable fit.

5.3 Video Demonstration (Similar Product)

The following video demonstrates the usage and features of a similar STF product, the Iron Earth headphones, which share common functionalities like wireless audio and water resistance. Please note that specific features or design elements may vary slightly from the Sport One Pro model.

Video 1: Demonstration of STF Iron Earth headphones, showcasing features like wireless audio and water resistance. This provides a general idea of STF product functionality.

6. Maintenance

To ensure the longevity and optimal performance of your STF Sport One Pro headphones, follow these maintenance guidelines:

  • Cleaning: Regularly wipe the headphones and charging case with a soft, dry cloth. For stubborn dirt, use a slightly damp cloth with mild soap. Avoid using harsh chemicals or abrasive materials.
  • Storage: When not in use, store the headphones in their charging case to protect them from dust and damage.
  • Charging: If the headphones will not be used for an extended period, charge them at least once every three months to maintain battery health.

7. Troubleshooting

7.1 Connectivity Issues

  • Headphones not pairing: Ensure both headphones are in the charging case, then open the lid. Check your device's Bluetooth settings to see if "STF Sport One Pro" appears. If not, try resetting the headphones (see manufacturer's website for specific reset instructions if not covered in this manual).
  • Intermittent connection: Ensure your device is within the effective Bluetooth range (typically 10 meters) and there are no major obstructions. Try disconnecting and reconnecting the headphones from your device's Bluetooth settings.

7.2 Audio Issues

  • No sound: Check the volume levels on both your headphones and your connected device. Ensure the headphones are properly paired.
  • Low volume: Adjust the volume on both the headphones and your device. Ensure the earbuds are positioned correctly in your ears for optimal sound delivery.

7.3 Charging Issues

  • Headphones not charging: Ensure the charging contacts on the headphones and inside the case are clean and free of debris. Make sure the charging cable is securely connected to both the case and the power source.
  • Case not charging: Verify the USB-C cable and power adapter are working correctly. Try a different cable or power source.

8. Specifications

FeatureDetail
BrandSTF
Model NameSport One Pro
Model NumberST-E12476
ColorBlanco (White)
Ear PlacementOpen-Ear (Canal auditivo)
Form FactorSupraaurales (Over-ear hook)
Connectivity TechnologyWireless
Water Resistance LevelIPX5 (Resistant to water jets)
Battery Life (Earbuds)Up to 7 Hours
Total Battery Life (with Case)Up to 22 Hours
Charging TimeApprox. 7 Hours
Control MethodPush Button, Touch
Compatible DevicesDesktop Computer, Tablets, Mobile Phones, Video Game Consoles
Country of OriginChina

9. Warranty and Support

The STF Sport One Pro headphones come with a 5-year warranty. For warranty claims, technical support, or any questions regarding your product, please refer to the contact information provided on the official STF website or your purchase documentation.

You can also visit the STF Store on Amazon for more information and product updates.

© 2026 STF. All rights reserved.

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